Finding the Fourth Proportional to 123,358.83, 170,236.61 and 72,372.47

Step by Step Solution

1. Step 1: Write the proportion equation
   123,358.83 : 170,236.61 = 72,372.47 : x
2. Step 2: Convert to fraction form
   123,358.83/170,236.61 = 72,372.47/x
3. Step 3: Cross multiply
   123,358.83x = 170,236.61 × 72,372.47
4. Step 4: Simplify right side
   123,358.83x = 12,320,442,737.08
5. Step 5: Solve for x
   x = 12,320,442,737.08/123,358.83
6. Step 6: Final answer
   x = 99,874.83