Finding the Fourth Proportional to 9,414.03, 12,991.59 and 5,165.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,414.03 : 12,991.59 = 5,165.28 : x
2. Step 2: Convert to fraction form
   9,414.03/12,991.59 = 5,165.28/x
3. Step 3: Cross multiply
   9,414.03x = 12,991.59 × 5,165.28
4. Step 4: Simplify right side
   9,414.03x = 67,105,200.00
5. Step 5: Solve for x
   x = 67,105,200.00/9,414.03
6. Step 6: Final answer
   x = 7,128.21