Finding the Fourth Proportional to 142,605.50, 196,928.94 and 91,706.62

Step by Step Solution

1. Step 1: Write the proportion equation
   142,605.50 : 196,928.94 = 91,706.62 : x
2. Step 2: Convert to fraction form
   142,605.50/196,928.94 = 91,706.62/x
3. Step 3: Cross multiply
   142,605.50x = 196,928.94 × 91,706.62
4. Step 4: Simplify right side
   142,605.50x = 18,059,686,975.26
5. Step 5: Solve for x
   x = 18,059,686,975.26/142,605.50
6. Step 6: Final answer
   x = 126,640.89