Finding the Fourth Proportional to 213,677,309.78, 318,719,445.17 and 194,061,158.17

Step by Step Solution

1. Step 1: Write the proportion equation
   213,677,309.78 : 318,719,445.17 = 194,061,158.17 : x
2. Step 2: Convert to fraction form
   213,677,309.78/318,719,445.17 = 194,061,158.17/x
3. Step 3: Cross multiply
   213,677,309.78x = 318,719,445.17 × 194,061,158.17
4. Step 4: Simplify right side
   213,677,309.78x = 61,851,064,659,222,912
5. Step 5: Solve for x
   x = 61,851,064,659,222,912/213,677,309.78
6. Step 6: Final answer
   x = 289,460,143.07