Finding the Fourth Proportional to 142,046.10, 213,069.15 and 82,851.30

Step by Step Solution

1. Step 1: Write the proportion equation
   142,046.10 : 213,069.15 = 82,851.30 : x
2. Step 2: Convert to fraction form
   142,046.10/213,069.15 = 82,851.30/x
3. Step 3: Cross multiply
   142,046.10x = 213,069.15 × 82,851.30
4. Step 4: Simplify right side
   142,046.10x = 17,653,056,067.40
5. Step 5: Solve for x
   x = 17,653,056,067.40/142,046.10
6. Step 6: Final answer
   x = 124,276.95