Finding the Fourth Proportional to 9,308.50, 12,845.75 and 5,116.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,308.50 : 12,845.75 = 5,116.78 : x
2. Step 2: Convert to fraction form
   9,308.50/12,845.75 = 5,116.78/x
3. Step 3: Cross multiply
   9,308.50x = 12,845.75 × 5,116.78
4. Step 4: Simplify right side
   9,308.50x = 65,728,876.69
5. Step 5: Solve for x
   x = 65,728,876.69/9,308.50
6. Step 6: Final answer
   x = 7,061.17