Finding the Fourth Proportional to 156,959,256.78, 216,602,055.50 and 86,393,358.27

Step by Step Solution

1. Step 1: Write the proportion equation
   156,959,256.78 : 216,602,055.50 = 86,393,358.27 : x
2. Step 2: Convert to fraction form
   156,959,256.78/216,602,055.50 = 86,393,358.27/x
3. Step 3: Cross multiply
   156,959,256.78x = 216,602,055.50 × 86,393,358.27
4. Step 4: Simplify right side
   156,959,256.78x = 18,712,978,982,397,956
5. Step 5: Solve for x
   x = 18,712,978,982,397,956/156,959,256.78
6. Step 6: Final answer
   x = 119,221,888.32