Finding the Fourth Proportional to 8,606.15, 12,913.18 and 5,103.11

Step by Step Solution

1. Step 1: Write the proportion equation
   8,606.15 : 12,913.18 = 5,103.11 : x
2. Step 2: Convert to fraction form
   8,606.15/12,913.18 = 5,103.11/x
3. Step 3: Cross multiply
   8,606.15x = 12,913.18 × 5,103.11
4. Step 4: Simplify right side
   8,606.15x = 65,897,300.67
5. Step 5: Solve for x
   x = 65,897,300.67/8,606.15
6. Step 6: Final answer
   x = 7,657.00