Finding the Fourth Proportional to 9,312.28, 12,850.78 and 5,120.24

Step by Step Solution

1. Step 1: Write the proportion equation
   9,312.28 : 12,850.78 = 5,120.24 : x
2. Step 2: Convert to fraction form
   9,312.28/12,850.78 = 5,120.24/x
3. Step 3: Cross multiply
   9,312.28x = 12,850.78 × 5,120.24
4. Step 4: Simplify right side
   9,312.28x = 65,799,077.79
5. Step 5: Solve for x
   x = 65,799,077.79/9,312.28
6. Step 6: Final answer
   x = 7,065.84