Finding the Fourth Proportional to 9,414.18, 12,989.48 and 5,434.43

Step by Step Solution

1. Step 1: Write the proportion equation
   9,414.18 : 12,989.48 = 5,434.43 : x
2. Step 2: Convert to fraction form
   9,414.18/12,989.48 = 5,434.43/x
3. Step 3: Cross multiply
   9,414.18x = 12,989.48 × 5,434.43
4. Step 4: Simplify right side
   9,414.18x = 70,590,327.68
5. Step 5: Solve for x
   x = 70,590,327.68/9,414.18
6. Step 6: Final answer
   x = 7,498.30