Finding the Fourth Proportional to 124,658.76, 187,056.18 and 72,170.76

Step by Step Solution

1. Step 1: Write the proportion equation
   124,658.76 : 187,056.18 = 72,170.76 : x
2. Step 2: Convert to fraction form
   124,658.76/187,056.18 = 72,170.76/x
3. Step 3: Cross multiply
   124,658.76x = 187,056.18 × 72,170.76
4. Step 4: Simplify right side
   124,658.76x = 13,499,986,673.30
5. Step 5: Solve for x
   x = 13,499,986,673.30/124,658.76
6. Step 6: Final answer
   x = 108,295.53