Finding the Fourth Proportional to 142,631.56, 196,844.76 and 78,969.36

Step by Step Solution

1. Step 1: Write the proportion equation
   142,631.56 : 196,844.76 = 78,969.36 : x
2. Step 2: Convert to fraction form
   142,631.56/196,844.76 = 78,969.36/x
3. Step 3: Cross multiply
   142,631.56x = 196,844.76 × 78,969.36
4. Step 4: Simplify right side
   142,631.56x = 15,544,705,454.72
5. Step 5: Solve for x
   x = 15,544,705,454.72/142,631.56
6. Step 6: Final answer
   x = 108,985.03