Finding the Fourth Proportional to 12,987.26, 17,922.42 and 7,682.43

Step by Step Solution

1. Step 1: Write the proportion equation
   12,987.26 : 17,922.42 = 7,682.43 : x
2. Step 2: Convert to fraction form
   12,987.26/17,922.42 = 7,682.43/x
3. Step 3: Cross multiply
   12,987.26x = 17,922.42 × 7,682.43
4. Step 4: Simplify right side
   12,987.26x = 137,687,737.08
5. Step 5: Solve for x
   x = 137,687,737.08/12,987.26
6. Step 6: Final answer
   x = 10,601.76