Finding the Fourth Proportional to 12,121.98, 16,738.02 and 7,875.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,121.98 : 16,738.02 = 7,875.15 : x
2. Step 2: Convert to fraction form
   12,121.98/16,738.02 = 7,875.15/x
3. Step 3: Cross multiply
   12,121.98x = 16,738.02 × 7,875.15
4. Step 4: Simplify right side
   12,121.98x = 131,814,418.20
5. Step 5: Solve for x
   x = 131,814,418.20/12,121.98
6. Step 6: Final answer
   x = 10,874.00