Finding the Fourth Proportional to 142,371.31, 196,463.96 and 78,705.31

Step by Step Solution

1. Step 1: Write the proportion equation
   142,371.31 : 196,463.96 = 78,705.31 : x
2. Step 2: Convert to fraction form
   142,371.31/196,463.96 = 78,705.31/x
3. Step 3: Cross multiply
   142,371.31x = 196,463.96 × 78,705.31
4. Step 4: Simplify right side
   142,371.31x = 15,462,756,581.23
5. Step 5: Solve for x
   x = 15,462,756,581.23/142,371.31
6. Step 6: Final answer
   x = 108,608.66