Finding the Fourth Proportional to 140,144.91, 193,406.27 and 78,912.16

Step by Step Solution

1. Step 1: Write the proportion equation
   140,144.91 : 193,406.27 = 78,912.16 : x
2. Step 2: Convert to fraction form
   140,144.91/193,406.27 = 78,912.16/x
3. Step 3: Cross multiply
   140,144.91x = 193,406.27 × 78,912.16
4. Step 4: Simplify right side
   140,144.91x = 15,262,105,864.69
5. Step 5: Solve for x
   x = 15,262,105,864.69/140,144.91
6. Step 6: Final answer
   x = 108,902.32