Finding the Fourth Proportional to 9,266.27, 12,787.46 and 5,287.47

Step by Step Solution

1. Step 1: Write the proportion equation
   9,266.27 : 12,787.46 = 5,287.47 : x
2. Step 2: Convert to fraction form
   9,266.27/12,787.46 = 5,287.47/x
3. Step 3: Cross multiply
   9,266.27x = 12,787.46 × 5,287.47
4. Step 4: Simplify right side
   9,266.27x = 67,613,312.07
5. Step 5: Solve for x
   x = 67,613,312.07/9,266.27
6. Step 6: Final answer
   x = 7,296.71