Finding the Fourth Proportional to 12,992.28, 17,925.09 and 7,951.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,992.28 : 17,925.09 = 7,951.25 : x
2. Step 2: Convert to fraction form
   12,992.28/17,925.09 = 7,951.25/x
3. Step 3: Cross multiply
   12,992.28x = 17,925.09 × 7,951.25
4. Step 4: Simplify right side
   12,992.28x = 142,526,871.86
5. Step 5: Solve for x
   x = 142,526,871.86/12,992.28
6. Step 6: Final answer
   x = 10,970.12