Finding the Fourth Proportional to 89,427.79, 123,375 and 57,615.25

Step by Step Solution

1. Step 1: Write the proportion equation
   89,427.79 : 123,375 = 57,615.25 : x
2. Step 2: Convert to fraction form
   89,427.79/123,375 = 57,615.25/x
3. Step 3: Cross multiply
   89,427.79x = 123,375 × 57,615.25
4. Step 4: Simplify right side
   89,427.79x = 7,108,281,468.75
5. Step 5: Solve for x
   x = 7,108,281,468.75/89,427.79
6. Step 6: Final answer
   x = 79,486.27