Finding the Fourth Proportional to 12,818.92, 17,690.34 and 7,517.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,818.92 : 17,690.34 = 7,517.56 : x
2. Step 2: Convert to fraction form
   12,818.92/17,690.34 = 7,517.56/x
3. Step 3: Cross multiply
   12,818.92x = 17,690.34 × 7,517.56
4. Step 4: Simplify right side
   12,818.92x = 132,988,192.37
5. Step 5: Solve for x
   x = 132,988,192.37/12,818.92
6. Step 6: Final answer
   x = 10,374.37