Finding the Fourth Proportional to 124,870.62, 187,079.13 and 72,168.78

Step by Step Solution

1. Step 1: Write the proportion equation
   124,870.62 : 187,079.13 = 72,168.78 : x
2. Step 2: Convert to fraction form
   124,870.62/187,079.13 = 72,168.78/x
3. Step 3: Cross multiply
   124,870.62x = 187,079.13 × 72,168.78
4. Step 4: Simplify right side
   124,870.62x = 13,501,272,575.56
5. Step 5: Solve for x
   x = 13,501,272,575.56/124,870.62
6. Step 6: Final answer
   x = 108,122.09