Finding the Fourth Proportional to 142,690.06, 196,913.73 and 86,090.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,690.06 : 196,913.73 = 86,090.50 : x
2. Step 2: Convert to fraction form
   142,690.06/196,913.73 = 86,090.50/x
3. Step 3: Cross multiply
   142,690.06x = 196,913.73 × 86,090.50
4. Step 4: Simplify right side
   142,690.06x = 16,952,401,472.57
5. Step 5: Solve for x
   x = 16,952,401,472.57/142,690.06
6. Step 6: Final answer
   x = 118,805.76