Finding the Fourth Proportional to 89,446.95, 123,448.46 and 57,708.18

Step by Step Solution

1. Step 1: Write the proportion equation
   89,446.95 : 123,448.46 = 57,708.18 : x
2. Step 2: Convert to fraction form
   89,446.95/123,448.46 = 57,708.18/x
3. Step 3: Cross multiply
   89,446.95x = 123,448.46 × 57,708.18
4. Step 4: Simplify right side
   89,446.95x = 7,123,985,661.86
5. Step 5: Solve for x
   x = 7,123,985,661.86/89,446.95
6. Step 6: Final answer
   x = 79,644.81