Finding the Fourth Proportional to 142,086.48, 212,978.16 and 106,917.36

Step by Step Solution

1. Step 1: Write the proportion equation
   142,086.48 : 212,978.16 = 106,917.36 : x
2. Step 2: Convert to fraction form
   142,086.48/212,978.16 = 106,917.36/x
3. Step 3: Cross multiply
   142,086.48x = 212,978.16 × 106,917.36
4. Step 4: Simplify right side
   142,086.48x = 22,771,062,604.86
5. Step 5: Solve for x
   x = 22,771,062,604.86/142,086.48
6. Step 6: Final answer
   x = 160,261.99