Finding the Fourth Proportional to 9,666.24, 13,340.55 and 5,417.99

Step by Step Solution

1. Step 1: Write the proportion equation
   9,666.24 : 13,340.55 = 5,417.99 : x
2. Step 2: Convert to fraction form
   9,666.24/13,340.55 = 5,417.99/x
3. Step 3: Cross multiply
   9,666.24x = 13,340.55 × 5,417.99
4. Step 4: Simplify right side
   9,666.24x = 72,278,939.66
5. Step 5: Solve for x
   x = 72,278,939.66/9,666.24
6. Step 6: Final answer
   x = 7,477.46