Finding the Fourth Proportional to 142,471.46, 196,612.16 and 77,939.31

Step by Step Solution

1. Step 1: Write the proportion equation
   142,471.46 : 196,612.16 = 77,939.31 : x
2. Step 2: Convert to fraction form
   142,471.46/196,612.16 = 77,939.31/x
3. Step 3: Cross multiply
   142,471.46x = 196,612.16 × 77,939.31
4. Step 4: Simplify right side
   142,471.46x = 15,323,815,215.10
5. Step 5: Solve for x
   x = 15,323,815,215.10/142,471.46
6. Step 6: Final answer
   x = 107,557.09