Finding the Fourth Proportional to 72,462.95, 99,883.31 and 57,124.49

Step by Step Solution

1. Step 1: Write the proportion equation
   72,462.95 : 99,883.31 = 57,124.49 : x
2. Step 2: Convert to fraction form
   72,462.95/99,883.31 = 57,124.49/x
3. Step 3: Cross multiply
   72,462.95x = 99,883.31 × 57,124.49
4. Step 4: Simplify right side
   72,462.95x = 5,705,782,857.64
5. Step 5: Solve for x
   x = 5,705,782,857.64/72,462.95
6. Step 6: Final answer
   x = 78,740.69