Finding the Fourth Proportional to 9,666.12, 13,340.18 and 5,417.89

Step by Step Solution

1. Step 1: Write the proportion equation
   9,666.12 : 13,340.18 = 5,417.89 : x
2. Step 2: Convert to fraction form
   9,666.12/13,340.18 = 5,417.89/x
3. Step 3: Cross multiply
   9,666.12x = 13,340.18 × 5,417.89
4. Step 4: Simplify right side
   9,666.12x = 72,275,627.82
5. Step 5: Solve for x
   x = 72,275,627.82/9,666.12
6. Step 6: Final answer
   x = 7,477.21