Finding the Fourth Proportional to 143,017.94, 197,370.04 and 86,418.38

Step by Step Solution

1. Step 1: Write the proportion equation
   143,017.94 : 197,370.04 = 86,418.38 : x
2. Step 2: Convert to fraction form
   143,017.94/197,370.04 = 86,418.38/x
3. Step 3: Cross multiply
   143,017.94x = 197,370.04 × 86,418.38
4. Step 4: Simplify right side
   143,017.94x = 17,056,399,117.34
5. Step 5: Solve for x
   x = 17,056,399,117.34/143,017.94
6. Step 6: Final answer
   x = 119,260.56