Finding the Fourth Proportional to 142,123.51, 196,129.18 and 78,459.94

Step by Step Solution

1. Step 1: Write the proportion equation
   142,123.51 : 196,129.18 = 78,459.94 : x
2. Step 2: Convert to fraction form
   142,123.51/196,129.18 = 78,459.94/x
3. Step 3: Cross multiply
   142,123.51x = 196,129.18 × 78,459.94
4. Step 4: Simplify right side
   142,123.51x = 15,388,283,695.05
5. Step 5: Solve for x
   x = 15,388,283,695.05/142,123.51
6. Step 6: Final answer
   x = 108,274.02