Finding the Fourth Proportional to 72,414.95, 99,993.49 and 54,478.85

Step by Step Solution

1. Step 1: Write the proportion equation
   72,414.95 : 99,993.49 = 54,478.85 : x
2. Step 2: Convert to fraction form
   72,414.95/99,993.49 = 54,478.85/x
3. Step 3: Cross multiply
   72,414.95x = 99,993.49 × 54,478.85
4. Step 4: Simplify right side
   72,414.95x = 5,447,529,706.52
5. Step 5: Solve for x
   x = 5,447,529,706.52/72,414.95
6. Step 6: Final answer
   x = 75,226.59