Finding the Fourth Proportional to 142,642.52, 196,849.76 and 78,114.48

Step by Step Solution

1. Step 1: Write the proportion equation
   142,642.52 : 196,849.76 = 78,114.48 : x
2. Step 2: Convert to fraction form
   142,642.52/196,849.76 = 78,114.48/x
3. Step 3: Cross multiply
   142,642.52x = 196,849.76 × 78,114.48
4. Step 4: Simplify right side
   142,642.52x = 15,376,816,640.52
5. Step 5: Solve for x
   x = 15,376,816,640.52/142,642.52
6. Step 6: Final answer
   x = 107,799.67