Finding the Fourth Proportional to 9,966.46, 13,753.42 and 5,718.22

Step by Step Solution

1. Step 1: Write the proportion equation
   9,966.46 : 13,753.42 = 5,718.22 : x
2. Step 2: Convert to fraction form
   9,966.46/13,753.42 = 5,718.22/x
3. Step 3: Cross multiply
   9,966.46x = 13,753.42 × 5,718.22
4. Step 4: Simplify right side
   9,966.46x = 78,645,081.31
5. Step 5: Solve for x
   x = 78,645,081.31/9,966.46
6. Step 6: Final answer
   x = 7,890.97