Finding the Fourth Proportional to 142,362.56, 196,443.24 and 78,691.64

Step by Step Solution

1. Step 1: Write the proportion equation
   142,362.56 : 196,443.24 = 78,691.64 : x
2. Step 2: Convert to fraction form
   142,362.56/196,443.24 = 78,691.64/x
3. Step 3: Cross multiply
   142,362.56x = 196,443.24 × 78,691.64
4. Step 4: Simplify right side
   142,362.56x = 15,458,440,722.51
5. Step 5: Solve for x
   x = 15,458,440,722.51/142,362.56
6. Step 6: Final answer
   x = 108,585.02