Finding the Fourth Proportional to 156,914.55, 216,591.62 and 100,326.15

Step by Step Solution

1. Step 1: Write the proportion equation
   156,914.55 : 216,591.62 = 100,326.15 : x
2. Step 2: Convert to fraction form
   156,914.55/216,591.62 = 100,326.15/x
3. Step 3: Cross multiply
   156,914.55x = 216,591.62 × 100,326.15
4. Step 4: Simplify right side
   156,914.55x = 21,729,803,356.86
5. Step 5: Solve for x
   x = 21,729,803,356.86/156,914.55
6. Step 6: Final answer
   x = 138,481.76