Finding the Fourth Proportional to 143,066.90, 197,370.69 and 86,445.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,066.90 : 197,370.69 = 86,445.50 : x
2. Step 2: Convert to fraction form
   143,066.90/197,370.69 = 86,445.50/x
3. Step 3: Cross multiply
   143,066.90x = 197,370.69 × 86,445.50
4. Step 4: Simplify right side
   143,066.90x = 17,061,807,982.40
5. Step 5: Solve for x
   x = 17,061,807,982.40/143,066.90
6. Step 6: Final answer
   x = 119,257.55