Finding the Fourth Proportional to 9,272.16, 12,792.36 and 5,290.38

Step by Step Solution

1. Step 1: Write the proportion equation
   9,272.16 : 12,792.36 = 5,290.38 : x
2. Step 2: Convert to fraction form
   9,272.16/12,792.36 = 5,290.38/x
3. Step 3: Cross multiply
   9,272.16x = 12,792.36 × 5,290.38
4. Step 4: Simplify right side
   9,272.16x = 67,676,445.50
5. Step 5: Solve for x
   x = 67,676,445.50/9,272.16
6. Step 6: Final answer
   x = 7,298.89