Finding the Fourth Proportional to 142,700.98, 196,928.78 and 86,101.42

Step by Step Solution

1. Step 1: Write the proportion equation
   142,700.98 : 196,928.78 = 86,101.42 : x
2. Step 2: Convert to fraction form
   142,700.98/196,928.78 = 86,101.42/x
3. Step 3: Cross multiply
   142,700.98x = 196,928.78 × 86,101.42
4. Step 4: Simplify right side
   142,700.98x = 16,955,847,596.87
5. Step 5: Solve for x
   x = 16,955,847,596.87/142,700.98
6. Step 6: Final answer
   x = 118,820.82