Finding the Fourth Proportional to 156,915.32, 235,190.46 and 72,498.20

Step by Step Solution

1. Step 1: Write the proportion equation
   156,915.32 : 235,190.46 = 72,498.20 : x
2. Step 2: Convert to fraction form
   156,915.32/235,190.46 = 72,498.20/x
3. Step 3: Cross multiply
   156,915.32x = 235,190.46 × 72,498.20
4. Step 4: Simplify right side
   156,915.32x = 17,050,885,007.17
5. Step 5: Solve for x
   x = 17,050,885,007.17/156,915.32
6. Step 6: Final answer
   x = 108,662.97