Finding the Fourth Proportional to 89,583.92, 123,493.28 and 57,315.06

Step by Step Solution

1. Step 1: Write the proportion equation
   89,583.92 : 123,493.28 = 57,315.06 : x
2. Step 2: Convert to fraction form
   89,583.92/123,493.28 = 57,315.06/x
3. Step 3: Cross multiply
   89,583.92x = 123,493.28 × 57,315.06
4. Step 4: Simplify right side
   89,583.92x = 7,078,024,752.80
5. Step 5: Solve for x
   x = 7,078,024,752.80/89,583.92
6. Step 6: Final answer
   x = 79,009.99