Finding the Fourth Proportional to 89,391.05, 123,324.35 and 57,578.43

Step by Step Solution

1. Step 1: Write the proportion equation
   89,391.05 : 123,324.35 = 57,578.43 : x
2. Step 2: Convert to fraction form
   89,391.05/123,324.35 = 57,578.43/x
3. Step 3: Cross multiply
   89,391.05x = 123,324.35 × 57,578.43
4. Step 4: Simplify right side
   89,391.05x = 7,100,822,453.77
5. Step 5: Solve for x
   x = 7,100,822,453.77/89,391.05
6. Step 6: Final answer
   x = 79,435.50