Finding the Fourth Proportional to 143,016.72, 197,341.16 and 85,642.61

Step by Step Solution

1. Step 1: Write the proportion equation
   143,016.72 : 197,341.16 = 85,642.61 : x
2. Step 2: Convert to fraction form
   143,016.72/197,341.16 = 85,642.61/x
3. Step 3: Cross multiply
   143,016.72x = 197,341.16 × 85,642.61
4. Step 4: Simplify right side
   143,016.72x = 16,900,810,587.91
5. Step 5: Solve for x
   x = 16,900,810,587.91/143,016.72
6. Step 6: Final answer
   x = 118,173.67