Finding the Fourth Proportional to 9,434.38, 13,021.02 and 5,457.91

Step by Step Solution

1. Step 1: Write the proportion equation
   9,434.38 : 13,021.02 = 5,457.91 : x
2. Step 2: Convert to fraction form
   9,434.38/13,021.02 = 5,457.91/x
3. Step 3: Cross multiply
   9,434.38x = 13,021.02 × 5,457.91
4. Step 4: Simplify right side
   9,434.38x = 71,067,555.27
5. Step 5: Solve for x
   x = 71,067,555.27/9,434.38
6. Step 6: Final answer
   x = 7,532.83