Finding the Fourth Proportional to 9,663.54, 14,499.89 and 5,280.87

Step by Step Solution

1. Step 1: Write the proportion equation
   9,663.54 : 14,499.89 = 5,280.87 : x
2. Step 2: Convert to fraction form
   9,663.54/14,499.89 = 5,280.87/x
3. Step 3: Cross multiply
   9,663.54x = 14,499.89 × 5,280.87
4. Step 4: Simplify right side
   9,663.54x = 76,572,034.10
5. Step 5: Solve for x
   x = 76,572,034.10/9,663.54
6. Step 6: Final answer
   x = 7,923.81