Finding the Fourth Proportional to 12,920.88, 17,830.20 and 7,951.92

Step by Step Solution

1. Step 1: Write the proportion equation
   12,920.88 : 17,830.20 = 7,951.92 : x
2. Step 2: Convert to fraction form
   12,920.88/17,830.20 = 7,951.92/x
3. Step 3: Cross multiply
   12,920.88x = 17,830.20 × 7,951.92
4. Step 4: Simplify right side
   12,920.88x = 141,784,323.98
5. Step 5: Solve for x
   x = 141,784,323.98/12,920.88
6. Step 6: Final answer
   x = 10,973.27