Finding the Fourth Proportional to 142,123.76, 196,129.52 and 78,460.19

Step by Step Solution

1. Step 1: Write the proportion equation
   142,123.76 : 196,129.52 = 78,460.19 : x
2. Step 2: Convert to fraction form
   142,123.76/196,129.52 = 78,460.19/x
3. Step 3: Cross multiply
   142,123.76x = 196,129.52 × 78,460.19
4. Step 4: Simplify right side
   142,123.76x = 15,388,359,403.81
5. Step 5: Solve for x
   x = 15,388,359,403.81/142,123.76
6. Step 6: Final answer
   x = 108,274.36