Finding the Fourth Proportional to 156,669.70, 235,134.15 and 72,559.30

Step by Step Solution

1. Step 1: Write the proportion equation
   156,669.70 : 235,134.15 = 72,559.30 : x
2. Step 2: Convert to fraction form
   156,669.70/235,134.15 = 72,559.30/x
3. Step 3: Cross multiply
   156,669.70x = 235,134.15 × 72,559.30
4. Step 4: Simplify right side
   156,669.70x = 17,061,169,330.10
5. Step 5: Solve for x
   x = 17,061,169,330.10/156,669.70
6. Step 6: Final answer
   x = 108,898.97