Finding the Fourth Proportional to 142,605.85, 196,796.35 and 91,618.89

Step by Step Solution

1. Step 1: Write the proportion equation
   142,605.85 : 196,796.35 = 91,618.89 : x
2. Step 2: Convert to fraction form
   142,605.85/196,796.35 = 91,618.89/x
3. Step 3: Cross multiply
   142,605.85x = 196,796.35 × 91,618.89
4. Step 4: Simplify right side
   142,605.85x = 18,030,263,143.05
5. Step 5: Solve for x
   x = 18,030,263,143.05/142,605.85
6. Step 6: Final answer
   x = 126,434.25