Finding the Fourth Proportional to 12,869.64, 17,752.50 and 7,893

Step by Step Solution

1. Step 1: Write the proportion equation
   12,869.64 : 17,752.50 = 7,893 : x
2. Step 2: Convert to fraction form
   12,869.64/17,752.50 = 7,893/x
3. Step 3: Cross multiply
   12,869.64x = 17,752.50 × 7,893
4. Step 4: Simplify right side
   12,869.64x = 140,120,482.50
5. Step 5: Solve for x
   x = 140,120,482.50/12,869.64
6. Step 6: Final answer
   x = 10,887.68