Finding the Fourth Proportional to 142,697.31, 196,923.74 and 86,097.75

Step by Step Solution

1. Step 1: Write the proportion equation
   142,697.31 : 196,923.74 = 86,097.75 : x
2. Step 2: Convert to fraction form
   142,697.31/196,923.74 = 86,097.75/x
3. Step 3: Cross multiply
   142,697.31x = 196,923.74 × 86,097.75
4. Step 4: Simplify right side
   142,697.31x = 16,954,690,505.10
5. Step 5: Solve for x
   x = 16,954,690,505.10/142,697.31
6. Step 6: Final answer
   x = 118,815.77