Finding the Fourth Proportional to 143,065.90, 197,369.31 and 86,444.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,065.90 : 197,369.31 = 86,444.50 : x
2. Step 2: Convert to fraction form
   143,065.90/197,369.31 = 86,444.50/x
3. Step 3: Cross multiply
   143,065.90x = 197,369.31 × 86,444.50
4. Step 4: Simplify right side
   143,065.90x = 17,061,491,318.30
5. Step 5: Solve for x
   x = 17,061,491,318.30/143,065.90
6. Step 6: Final answer
   x = 119,256.17