Finding the Fourth Proportional to 9,966.67, 13,753.82 and 5,490.83

Step by Step Solution

1. Step 1: Write the proportion equation
   9,966.67 : 13,753.82 = 5,490.83 : x
2. Step 2: Convert to fraction form
   9,966.67/13,753.82 = 5,490.83/x
3. Step 3: Cross multiply
   9,966.67x = 13,753.82 × 5,490.83
4. Step 4: Simplify right side
   9,966.67x = 75,519,904.70
5. Step 5: Solve for x
   x = 75,519,904.70/9,966.67
6. Step 6: Final answer
   x = 7,577.25