Finding the Fourth Proportional to 142,051.10, 212,930.85 and 82,856.30

Step by Step Solution

1. Step 1: Write the proportion equation
   142,051.10 : 212,930.85 = 82,856.30 : x
2. Step 2: Convert to fraction form
   142,051.10/212,930.85 = 82,856.30/x
3. Step 3: Cross multiply
   142,051.10x = 212,930.85 × 82,856.30
4. Step 4: Simplify right side
   142,051.10x = 17,642,662,386.86
5. Step 5: Solve for x
   x = 17,642,662,386.86/142,051.10
6. Step 6: Final answer
   x = 124,199.41