Finding the Fourth Proportional to 238,862,153,513.42, 329,629,759,242.12 and 128,996,488,997.42

Step by Step Solution

1. Step 1: Write the proportion equation
   238,862,153,513.42 : 329,629,759,242.12 = 128,996,488,997.42 : x
2. Step 2: Convert to fraction form
   238,862,153,513.42/329,629,759,242.12 = 128,996,488,997.42/x
3. Step 3: Cross multiply
   238,862,153,513.42x = 329,629,759,242.12 × 128,996,488,997.42
4. Step 4: Simplify right side
   238,862,153,513.42x = 42,521,081,611,298,331,951,104
5. Step 5: Solve for x
   x = 42,521,081,611,298,331,951,104/238,862,153,513.42
6. Step 6: Final answer
   x = 178,015,148,008.41