Finding the Fourth Proportional to 156,516.57, 215,988.53 and 92,853

Step by Step Solution

1. Step 1: Write the proportion equation
   156,516.57 : 215,988.53 = 92,853 : x
2. Step 2: Convert to fraction form
   156,516.57/215,988.53 = 92,853/x
3. Step 3: Cross multiply
   156,516.57x = 215,988.53 × 92,853
4. Step 4: Simplify right side
   156,516.57x = 20,055,182,511.83
5. Step 5: Solve for x
   x = 20,055,182,511.83/156,516.57
6. Step 6: Final answer
   x = 128,134.56