Finding the Fourth Proportional to 142,164.60, 213,101.10 and 82,969.80

Step by Step Solution

1. Step 1: Write the proportion equation
   142,164.60 : 213,101.10 = 82,969.80 : x
2. Step 2: Convert to fraction form
   142,164.60/213,101.10 = 82,969.80/x
3. Step 3: Cross multiply
   142,164.60x = 213,101.10 × 82,969.80
4. Step 4: Simplify right side
   142,164.60x = 17,680,955,646.78
5. Step 5: Solve for x
   x = 17,680,955,646.78/142,164.60
6. Step 6: Final answer
   x = 124,369.61