Finding the Fourth Proportional to 9,269.86, 12,792.36 and 5,290.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,269.86 : 12,792.36 = 5,290.72 : x
2. Step 2: Convert to fraction form
   9,269.86/12,792.36 = 5,290.72/x
3. Step 3: Cross multiply
   9,269.86x = 12,792.36 × 5,290.72
4. Step 4: Simplify right side
   9,269.86x = 67,680,794.90
5. Step 5: Solve for x
   x = 67,680,794.90/9,269.86
6. Step 6: Final answer
   x = 7,301.17