Finding the Fourth Proportional to 9,263.30, 12,782.81 and 5,284.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,263.30 : 12,782.81 = 5,284.78 : x
2. Step 2: Convert to fraction form
   9,263.30/12,782.81 = 5,284.78/x
3. Step 3: Cross multiply
   9,263.30x = 12,782.81 × 5,284.78
4. Step 4: Simplify right side
   9,263.30x = 67,554,319.89
5. Step 5: Solve for x
   x = 67,554,319.89/9,263.30
6. Step 6: Final answer
   x = 7,292.69