Finding the Fourth Proportional to 142,042.30, 196,013.66 and 78,380.14

Step by Step Solution

1. Step 1: Write the proportion equation
   142,042.30 : 196,013.66 = 78,380.14 : x
2. Step 2: Convert to fraction form
   142,042.30/196,013.66 = 78,380.14/x
3. Step 3: Cross multiply
   142,042.30x = 196,013.66 × 78,380.14
4. Step 4: Simplify right side
   142,042.30x = 15,363,578,112.71
5. Step 5: Solve for x
   x = 15,363,578,112.71/142,042.30
6. Step 6: Final answer
   x = 108,161.99