Finding the Fourth Proportional to 9,308.90, 12,846.12 and 5,117.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,308.90 : 12,846.12 = 5,117.15 : x
2. Step 2: Convert to fraction form
   9,308.90/12,846.12 = 5,117.15/x
3. Step 3: Cross multiply
   9,308.90x = 12,846.12 × 5,117.15
4. Step 4: Simplify right side
   9,308.90x = 65,735,522.96
5. Step 5: Solve for x
   x = 65,735,522.96/9,308.90
6. Step 6: Final answer
   x = 7,061.58