Finding the Fourth Proportional to 222,602,656.32, 307,145,664.72 and 128,515,172.88

Step by Step Solution

1. Step 1: Write the proportion equation
   222,602,656.32 : 307,145,664.72 = 128,515,172.88 : x
2. Step 2: Convert to fraction form
   222,602,656.32/307,145,664.72 = 128,515,172.88/x
3. Step 3: Cross multiply
   222,602,656.32x = 307,145,664.72 × 128,515,172.88
4. Step 4: Simplify right side
   222,602,656.32x = 39,472,878,200,833,320
5. Step 5: Solve for x
   x = 39,472,878,200,833,320/222,602,656.32
6. Step 6: Final answer
   x = 177,324,380.82