Finding the Fourth Proportional to 9,279.46, 12,807.48 and 5,300.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,279.46 : 12,807.48 = 5,300.20 : x
2. Step 2: Convert to fraction form
   9,279.46/12,807.48 = 5,300.20/x
3. Step 3: Cross multiply
   9,279.46x = 12,807.48 × 5,300.20
4. Step 4: Simplify right side
   9,279.46x = 67,882,205.50
5. Step 5: Solve for x
   x = 67,882,205.50/9,279.46
6. Step 6: Final answer
   x = 7,315.32