Finding the Fourth Proportional to 123,730.47, 170,737.59 and 72,744.87

Step by Step Solution

1. Step 1: Write the proportion equation
   123,730.47 : 170,737.59 = 72,744.87 : x
2. Step 2: Convert to fraction form
   123,730.47/170,737.59 = 72,744.87/x
3. Step 3: Cross multiply
   123,730.47x = 170,737.59 × 72,744.87
4. Step 4: Simplify right side
   123,730.47x = 12,420,283,788.66
5. Step 5: Solve for x
   x = 12,420,283,788.66/123,730.47
6. Step 6: Final answer
   x = 100,381.77