Finding the Fourth Proportional to 142,353, 196,445.70 and 78,687.72

Step by Step Solution

1. Step 1: Write the proportion equation
   142,353 : 196,445.70 = 78,687.72 : x
2. Step 2: Convert to fraction form
   142,353/196,445.70 = 78,687.72/x
3. Step 3: Cross multiply
   142,353x = 196,445.70 × 78,687.72
4. Step 4: Simplify right side
   142,353x = 15,457,864,236.80
5. Step 5: Solve for x
   x = 15,457,864,236.80/142,353
6. Step 6: Final answer
   x = 108,588.26