Finding the Fourth Proportional to 12,913.83, 17,819.61 and 7,247.81

Step by Step Solution

1. Step 1: Write the proportion equation
   12,913.83 : 17,819.61 = 7,247.81 : x
2. Step 2: Convert to fraction form
   12,913.83/17,819.61 = 7,247.81/x
3. Step 3: Cross multiply
   12,913.83x = 17,819.61 × 7,247.81
4. Step 4: Simplify right side
   12,913.83x = 129,153,147.55
5. Step 5: Solve for x
   x = 129,153,147.55/12,913.83
6. Step 6: Final answer
   x = 10,001.15