Finding the Fourth Proportional to 12,992.72, 17,934.56 and 7,687.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,992.72 : 17,934.56 = 7,687.52 : x
2. Step 2: Convert to fraction form
   12,992.72/17,934.56 = 7,687.52/x
3. Step 3: Cross multiply
   12,992.72x = 17,934.56 × 7,687.52
4. Step 4: Simplify right side
   12,992.72x = 137,872,352.75
5. Step 5: Solve for x
   x = 137,872,352.75/12,992.72
6. Step 6: Final answer
   x = 10,611.51