Finding the Fourth Proportional to 12,642.85, 17,443.37 and 8,162.51

Step by Step Solution

1. Step 1: Write the proportion equation
   12,642.85 : 17,443.37 = 8,162.51 : x
2. Step 2: Convert to fraction form
   12,642.85/17,443.37 = 8,162.51/x
3. Step 3: Cross multiply
   12,642.85x = 17,443.37 × 8,162.51
4. Step 4: Simplify right side
   12,642.85x = 142,381,641.25
5. Step 5: Solve for x
   x = 142,381,641.25/12,642.85
6. Step 6: Final answer
   x = 11,261.84