Finding the Fourth Proportional to 9,200.72, 12,696.51 and 5,223.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,200.72 : 12,696.51 = 5,223.12 : x
2. Step 2: Convert to fraction form
   9,200.72/12,696.51 = 5,223.12/x
3. Step 3: Cross multiply
   9,200.72x = 12,696.51 × 5,223.12
4. Step 4: Simplify right side
   9,200.72x = 66,315,367.29
5. Step 5: Solve for x
   x = 66,315,367.29/9,200.72
6. Step 6: Final answer
   x = 7,207.63