Finding the Fourth Proportional to 9,057.30, 12,498.21 and 5,077.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,057.30 : 12,498.21 = 5,077.50 : x
2. Step 2: Convert to fraction form
   9,057.30/12,498.21 = 5,077.50/x
3. Step 3: Cross multiply
   9,057.30x = 12,498.21 × 5,077.50
4. Step 4: Simplify right side
   9,057.30x = 63,459,661.28
5. Step 5: Solve for x
   x = 63,459,661.28/9,057.30
6. Step 6: Final answer
   x = 7,006.47