Finding the Fourth Proportional to 9,966.49, 13,753.04 and 5,489.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,966.49 : 13,753.04 = 5,489.98 : x
2. Step 2: Convert to fraction form
   9,966.49/13,753.04 = 5,489.98/x
3. Step 3: Cross multiply
   9,966.49x = 13,753.04 × 5,489.98
4. Step 4: Simplify right side
   9,966.49x = 75,503,883.59
5. Step 5: Solve for x
   x = 75,503,883.59/9,966.49
6. Step 6: Final answer
   x = 7,575.77