Finding the Fourth Proportional to 12,992.52, 17,926.50 and 7,685.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,992.52 : 17,926.50 = 7,685.16 : x
2. Step 2: Convert to fraction form
   12,992.52/17,926.50 = 7,685.16/x
3. Step 3: Cross multiply
   12,992.52x = 17,926.50 × 7,685.16
4. Step 4: Simplify right side
   12,992.52x = 137,768,020.74
5. Step 5: Solve for x
   x = 137,768,020.74/12,992.52
6. Step 6: Final answer
   x = 10,603.64