Finding the Fourth Proportional to 9,240.12, 12,753.59 and 5,262.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,240.12 : 12,753.59 = 5,262.21 : x
2. Step 2: Convert to fraction form
   9,240.12/12,753.59 = 5,262.21/x
3. Step 3: Cross multiply
   9,240.12x = 12,753.59 × 5,262.21
4. Step 4: Simplify right side
   9,240.12x = 67,112,042.52
5. Step 5: Solve for x
   x = 67,112,042.52/9,240.12
6. Step 6: Final answer
   x = 7,263.11