Finding the Fourth Proportional to 9,414.90, 12,992.00 and 5,223.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,414.90 : 12,992.00 = 5,223.15 : x
2. Step 2: Convert to fraction form
   9,414.90/12,992.00 = 5,223.15/x
3. Step 3: Cross multiply
   9,414.90x = 12,992.00 × 5,223.15
4. Step 4: Simplify right side
   9,414.90x = 67,859,138.68
5. Step 5: Solve for x
   x = 67,859,138.68/9,414.90
6. Step 6: Final answer
   x = 7,207.63