Finding the Fourth Proportional to 9,414.30, 12,991.28 and 5,436.69

Step by Step Solution

1. Step 1: Write the proportion equation
   9,414.30 : 12,991.28 = 5,436.69 : x
2. Step 2: Convert to fraction form
   9,414.30/12,991.28 = 5,436.69/x
3. Step 3: Cross multiply
   9,414.30x = 12,991.28 × 5,436.69
4. Step 4: Simplify right side
   9,414.30x = 70,629,562.06
5. Step 5: Solve for x
   x = 70,629,562.06/9,414.30
6. Step 6: Final answer
   x = 7,502.37