Finding the Fourth Proportional to 12,170.25, 16,779.72 and 10,156.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,170.25 : 16,779.72 = 10,156.56 : x
2. Step 2: Convert to fraction form
   12,170.25/16,779.72 = 10,156.56/x
3. Step 3: Cross multiply
   12,170.25x = 16,779.72 × 10,156.56
4. Step 4: Simplify right side
   12,170.25x = 170,424,149.06
5. Step 5: Solve for x
   x = 170,424,149.06/12,170.25
6. Step 6: Final answer
   x = 14,003.35