Finding the Fourth Proportional to 9,057.77, 12,499.85 and 5,472.23

Step by Step Solution

1. Step 1: Write the proportion equation
   9,057.77 : 12,499.85 = 5,472.23 : x
2. Step 2: Convert to fraction form
   9,057.77/12,499.85 = 5,472.23/x
3. Step 3: Cross multiply
   9,057.77x = 12,499.85 × 5,472.23
4. Step 4: Simplify right side
   9,057.77x = 68,402,054.17
5. Step 5: Solve for x
   x = 68,402,054.17/9,057.77
6. Step 6: Final answer
   x = 7,551.75