Finding the Fourth Proportional to 142,270.56, 196,328.88 and 78,606.72

Step by Step Solution

1. Step 1: Write the proportion equation
   142,270.56 : 196,328.88 = 78,606.72 : x
2. Step 2: Convert to fraction form
   142,270.56/196,328.88 = 78,606.72/x
3. Step 3: Cross multiply
   142,270.56x = 196,328.88 × 78,606.72
4. Step 4: Simplify right side
   142,270.56x = 15,432,769,298.07
5. Step 5: Solve for x
   x = 15,432,769,298.07/142,270.56
6. Step 6: Final answer
   x = 108,474.79