Finding the Fourth Proportional to 9,307.80, 12,845.20 and 5,116.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,307.80 : 12,845.20 = 5,116.12 : x
2. Step 2: Convert to fraction form
   9,307.80/12,845.20 = 5,116.12/x
3. Step 3: Cross multiply
   9,307.80x = 12,845.20 × 5,116.12
4. Step 4: Simplify right side
   9,307.80x = 65,717,584.62
5. Step 5: Solve for x
   x = 65,717,584.62/9,307.80
6. Step 6: Final answer
   x = 7,060.49