Finding the Fourth Proportional to 9,966.52, 13,753.83 and 5,717.74

Step by Step Solution

1. Step 1: Write the proportion equation
   9,966.52 : 13,753.83 = 5,717.74 : x
2. Step 2: Convert to fraction form
   9,966.52/13,753.83 = 5,717.74/x
3. Step 3: Cross multiply
   9,966.52x = 13,753.83 × 5,717.74
4. Step 4: Simplify right side
   9,966.52x = 78,640,823.94
5. Step 5: Solve for x
   x = 78,640,823.94/9,966.52
6. Step 6: Final answer
   x = 7,890.50