Finding the Fourth Proportional to 9,264.80, 12,784.88 and 5,286.29

Step by Step Solution

1. Step 1: Write the proportion equation
   9,264.80 : 12,784.88 = 5,286.29 : x
2. Step 2: Convert to fraction form
   9,264.80/12,784.88 = 5,286.29/x
3. Step 3: Cross multiply
   9,264.80x = 12,784.88 × 5,286.29
4. Step 4: Simplify right side
   9,264.80x = 67,584,492.94
5. Step 5: Solve for x
   x = 67,584,492.94/9,264.80
6. Step 6: Final answer
   x = 7,294.76