Finding the Fourth Proportional to 123,487.93, 170,404.41 and 72,502.75

Step by Step Solution

1. Step 1: Write the proportion equation
   123,487.93 : 170,404.41 = 72,502.75 : x
2. Step 2: Convert to fraction form
   123,487.93/170,404.41 = 72,502.75/x
3. Step 3: Cross multiply
   123,487.93x = 170,404.41 × 72,502.75
4. Step 4: Simplify right side
   123,487.93x = 12,354,788,337.13
5. Step 5: Solve for x
   x = 12,354,788,337.13/123,487.93
6. Step 6: Final answer
   x = 100,048.55