Finding the Fourth Proportional to 143,583.82, 198,105.69 and 86,207.74

Step by Step Solution

1. Step 1: Write the proportion equation
   143,583.82 : 198,105.69 = 86,207.74 : x
2. Step 2: Convert to fraction form
   143,583.82/198,105.69 = 86,207.74/x
3. Step 3: Cross multiply
   143,583.82x = 198,105.69 × 86,207.74
4. Step 4: Simplify right side
   143,583.82x = 17,078,243,816.04
5. Step 5: Solve for x
   x = 17,078,243,816.04/143,583.82
6. Step 6: Final answer
   x = 118,942.68