Finding the Fourth Proportional to 143,474.72, 198,016.16 and 86,118.08

Step by Step Solution

1. Step 1: Write the proportion equation
   143,474.72 : 198,016.16 = 86,118.08 : x
2. Step 2: Convert to fraction form
   143,474.72/198,016.16 = 86,118.08/x
3. Step 3: Cross multiply
   143,474.72x = 198,016.16 × 86,118.08
4. Step 4: Simplify right side
   143,474.72x = 17,052,771,508.17
5. Step 5: Solve for x
   x = 17,052,771,508.17/143,474.72
6. Step 6: Final answer
   x = 118,855.58