Finding the Fourth Proportional to 142,057.31, 196,112.79 and 103,773.88

Step by Step Solution

1. Step 1: Write the proportion equation
   142,057.31 : 196,112.79 = 103,773.88 : x
2. Step 2: Convert to fraction form
   142,057.31/196,112.79 = 103,773.88/x
3. Step 3: Cross multiply
   142,057.31x = 196,112.79 × 103,773.88
4. Step 4: Simplify right side
   142,057.31x = 20,351,385,135.93
5. Step 5: Solve for x
   x = 20,351,385,135.93/142,057.31
6. Step 6: Final answer
   x = 143,261.79