Finding the Fourth Proportional to 9,540.28, 13,165.39 and 5,290.66

Step by Step Solution

1. Step 1: Write the proportion equation
   9,540.28 : 13,165.39 = 5,290.66 : x
2. Step 2: Convert to fraction form
   9,540.28/13,165.39 = 5,290.66/x
3. Step 3: Cross multiply
   9,540.28x = 13,165.39 × 5,290.66
4. Step 4: Simplify right side
   9,540.28x = 69,653,536.43
5. Step 5: Solve for x
   x = 69,653,536.43/9,540.28
6. Step 6: Final answer
   x = 7,300.99