Finding the Fourth Proportional to 89,429.79, 123,377.76 and 57,617.25

Step by Step Solution

1. Step 1: Write the proportion equation
   89,429.79 : 123,377.76 = 57,617.25 : x
2. Step 2: Convert to fraction form
   89,429.79/123,377.76 = 57,617.25/x
3. Step 3: Cross multiply
   89,429.79x = 123,377.76 × 57,617.25
4. Step 4: Simplify right side
   89,429.79x = 7,108,687,242.36
5. Step 5: Solve for x
   x = 7,108,687,242.36/89,429.79
6. Step 6: Final answer
   x = 79,489.03