Finding the Fourth Proportional to 12,818.96, 17,690.30 and 7,513.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,818.96 : 17,690.30 = 7,513.86 : x
2. Step 2: Convert to fraction form
   12,818.96/17,690.30 = 7,513.86/x
3. Step 3: Cross multiply
   12,818.96x = 17,690.30 × 7,513.86
4. Step 4: Simplify right side
   12,818.96x = 132,922,494.50
5. Step 5: Solve for x
   x = 132,922,494.50/12,818.96
6. Step 6: Final answer
   x = 10,369.21