Finding the Fourth Proportional to 142,363.62, 196,471.71 and 78,707.34

Step by Step Solution

1. Step 1: Write the proportion equation
   142,363.62 : 196,471.71 = 78,707.34 : x
2. Step 2: Convert to fraction form
   142,363.62/196,471.71 = 78,707.34/x
3. Step 3: Cross multiply
   142,363.62x = 196,471.71 × 78,707.34
4. Step 4: Simplify right side
   142,363.62x = 15,463,765,679.35
5. Step 5: Solve for x
   x = 15,463,765,679.35/142,363.62
6. Step 6: Final answer
   x = 108,621.61