Finding the Fourth Proportional to 89,429.32, 123,377.07 and 57,616.75

Step by Step Solution

1. Step 1: Write the proportion equation
   89,429.32 : 123,377.07 = 57,616.75 : x
2. Step 2: Convert to fraction form
   89,429.32/123,377.07 = 57,616.75/x
3. Step 3: Cross multiply
   89,429.32x = 123,377.07 × 57,616.75
4. Step 4: Simplify right side
   89,429.32x = 7,108,585,797.92
5. Step 5: Solve for x
   x = 7,108,585,797.92/89,429.32
6. Step 6: Final answer
   x = 79,488.31