Finding the Fourth Proportional to 142,392.56, 196,493.88 and 78,726.56

Step by Step Solution

1. Step 1: Write the proportion equation
   142,392.56 : 196,493.88 = 78,726.56 : x
2. Step 2: Convert to fraction form
   142,392.56/196,493.88 = 78,726.56/x
3. Step 3: Cross multiply
   142,392.56x = 196,493.88 × 78,726.56
4. Step 4: Simplify right side
   142,392.56x = 15,469,287,233.45
5. Step 5: Solve for x
   x = 15,469,287,233.45/142,392.56
6. Step 6: Final answer
   x = 108,638.31