Finding the Fourth Proportional to 142,097.49, 196,081.56 and 91,019.70

Step by Step Solution

1. Step 1: Write the proportion equation
   142,097.49 : 196,081.56 = 91,019.70 : x
2. Step 2: Convert to fraction form
   142,097.49/196,081.56 = 91,019.70/x
3. Step 3: Cross multiply
   142,097.49x = 196,081.56 × 91,019.70
4. Step 4: Simplify right side
   142,097.49x = 17,847,284,766.73
5. Step 5: Solve for x
   x = 17,847,284,766.73/142,097.49
6. Step 6: Final answer
   x = 125,598.87