Finding the Fourth Proportional to 12,818.62, 17,689.74 and 7,513.45

Step by Step Solution

1. Step 1: Write the proportion equation
   12,818.62 : 17,689.74 = 7,513.45 : x
2. Step 2: Convert to fraction form
   12,818.62/17,689.74 = 7,513.45/x
3. Step 3: Cross multiply
   12,818.62x = 17,689.74 × 7,513.45
4. Step 4: Simplify right side
   12,818.62x = 132,910,977.00
5. Step 5: Solve for x
   x = 132,910,977.00/12,818.62
6. Step 6: Final answer
   x = 10,368.59