Finding the Fourth Proportional to 89,388.18, 123,320.42 and 57,575.52

Step by Step Solution

1. Step 1: Write the proportion equation
   89,388.18 : 123,320.42 = 57,575.52 : x
2. Step 2: Convert to fraction form
   89,388.18/123,320.42 = 57,575.52/x
3. Step 3: Cross multiply
   89,388.18x = 123,320.42 × 57,575.52
4. Step 4: Simplify right side
   89,388.18x = 7,100,237,020.24
5. Step 5: Solve for x
   x = 7,100,237,020.24/89,388.18
6. Step 6: Final answer
   x = 79,431.50