Finding the Fourth Proportional to 142,665.92, 196,874.50 and 78,132.32

Step by Step Solution

1. Step 1: Write the proportion equation
   142,665.92 : 196,874.50 = 78,132.32 : x
2. Step 2: Convert to fraction form
   142,665.92/196,874.50 = 78,132.32/x
3. Step 3: Cross multiply
   142,665.92x = 196,874.50 × 78,132.32
4. Step 4: Simplify right side
   142,665.92x = 15,382,261,433.84
5. Step 5: Solve for x
   x = 15,382,261,433.84/142,665.92
6. Step 6: Final answer
   x = 107,820.15