Finding the Fourth Proportional to 142,123.27, 196,124.96 and 78,459.70

Step by Step Solution

1. Step 1: Write the proportion equation
   142,123.27 : 196,124.96 = 78,459.70 : x
2. Step 2: Convert to fraction form
   142,123.27/196,124.96 = 78,459.70/x
3. Step 3: Cross multiply
   142,123.27x = 196,124.96 × 78,459.70
4. Step 4: Simplify right side
   142,123.27x = 15,387,905,524.11
5. Step 5: Solve for x
   x = 15,387,905,524.11/142,123.27
6. Step 6: Final answer
   x = 108,271.54