Finding the Fourth Proportional to 9,262.28, 12,781.69 and 5,283.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,262.28 : 12,781.69 = 5,283.30 : x
2. Step 2: Convert to fraction form
   9,262.28/12,781.69 = 5,283.30/x
3. Step 3: Cross multiply
   9,262.28x = 12,781.69 × 5,283.30
4. Step 4: Simplify right side
   9,262.28x = 67,529,521.52
5. Step 5: Solve for x
   x = 67,529,521.52/9,262.28
6. Step 6: Final answer
   x = 7,290.81