Finding the Fourth Proportional to 12,818.32, 17,687.77 and 7,439.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,818.32 : 17,687.77 = 7,439.52 : x
2. Step 2: Convert to fraction form
   12,818.32/17,687.77 = 7,439.52/x
3. Step 3: Cross multiply
   12,818.32x = 17,687.77 × 7,439.52
4. Step 4: Simplify right side
   12,818.32x = 131,588,518.67
5. Step 5: Solve for x
   x = 131,588,518.67/12,818.32
6. Step 6: Final answer
   x = 10,265.66