Finding the Fourth Proportional to 12,613.17, 18,913.17 and 4,709.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,613.17 : 18,913.17 = 4,709.18 : x
2. Step 2: Convert to fraction form
   12,613.17/18,913.17 = 4,709.18/x
3. Step 3: Cross multiply
   12,613.17x = 18,913.17 × 4,709.18
4. Step 4: Simplify right side
   12,613.17x = 89,065,440.62
5. Step 5: Solve for x
   x = 89,065,440.62/12,613.17
6. Step 6: Final answer
   x = 7,061.31