Finding the Fourth Proportional to 9,966.91, 13,753.82 and 5,490.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,966.91 : 13,753.82 = 5,490.56 : x
2. Step 2: Convert to fraction form
   9,966.91/13,753.82 = 5,490.56/x
3. Step 3: Cross multiply
   9,966.91x = 13,753.82 × 5,490.56
4. Step 4: Simplify right side
   9,966.91x = 75,516,222.05
5. Step 5: Solve for x
   x = 75,516,222.05/9,966.91
6. Step 6: Final answer
   x = 7,576.70