Finding the Fourth Proportional to 142,978.18, 214,327.81 and 68,078.20

Step by Step Solution

1. Step 1: Write the proportion equation
   142,978.18 : 214,327.81 = 68,078.20 : x
2. Step 2: Convert to fraction form
   142,978.18/214,327.81 = 68,078.20/x
3. Step 3: Cross multiply
   142,978.18x = 214,327.81 × 68,078.20
4. Step 4: Simplify right side
   142,978.18x = 14,591,051,514.74
5. Step 5: Solve for x
   x = 14,591,051,514.74/142,978.18
6. Step 6: Final answer
   x = 102,050.90