Finding the Fourth Proportional to 9,966.56, 13,753.94 and 5,490.32

Step by Step Solution

1. Step 1: Write the proportion equation
   9,966.56 : 13,753.94 = 5,490.32 : x
2. Step 2: Convert to fraction form
   9,966.56/13,753.94 = 5,490.32/x
3. Step 3: Cross multiply
   9,966.56x = 13,753.94 × 5,490.32
4. Step 4: Simplify right side
   9,966.56x = 75,513,531.86
5. Step 5: Solve for x
   x = 75,513,531.86/9,966.56
6. Step 6: Final answer
   x = 7,576.69