Finding the Fourth Proportional to 142,053.10, 212,933.85 and 82,858.30

Step by Step Solution

1. Step 1: Write the proportion equation
   142,053.10 : 212,933.85 = 82,858.30 : x
2. Step 2: Convert to fraction form
   142,053.10/212,933.85 = 82,858.30/x
3. Step 3: Cross multiply
   142,053.10x = 212,933.85 × 82,858.30
4. Step 4: Simplify right side
   142,053.10x = 17,643,336,823.46
5. Step 5: Solve for x
   x = 17,643,336,823.46/142,053.10
6. Step 6: Final answer
   x = 124,202.41