Finding the Fourth Proportional to 9,966.83, 13,754.31 and 5,490.74

Step by Step Solution

1. Step 1: Write the proportion equation
   9,966.83 : 13,754.31 = 5,490.74 : x
2. Step 2: Convert to fraction form
   9,966.83/13,754.31 = 5,490.74/x
3. Step 3: Cross multiply
   9,966.83x = 13,754.31 × 5,490.74
4. Step 4: Simplify right side
   9,966.83x = 75,521,271.32
5. Step 5: Solve for x
   x = 75,521,271.32/9,966.83
6. Step 6: Final answer
   x = 7,577.26