Finding the Fourth Proportional to 12,868.64, 17,751.12 and 7,892

Step by Step Solution

1. Step 1: Write the proportion equation
   12,868.64 : 17,751.12 = 7,892 : x
2. Step 2: Convert to fraction form
   12,868.64/17,751.12 = 7,892/x
3. Step 3: Cross multiply
   12,868.64x = 17,751.12 × 7,892
4. Step 4: Simplify right side
   12,868.64x = 140,091,839.04
5. Step 5: Solve for x
   x = 140,091,839.04/12,868.64
6. Step 6: Final answer
   x = 10,886.30