Finding the Fourth Proportional to 9,966.11, 13,753.05 and 5,490.27

Step by Step Solution

1. Step 1: Write the proportion equation
   9,966.11 : 13,753.05 = 5,490.27 : x
2. Step 2: Convert to fraction form
   9,966.11/13,753.05 = 5,490.27/x
3. Step 3: Cross multiply
   9,966.11x = 13,753.05 × 5,490.27
4. Step 4: Simplify right side
   9,966.11x = 75,507,957.82
5. Step 5: Solve for x
   x = 75,507,957.82/9,966.11
6. Step 6: Final answer
   x = 7,576.48