Finding the Fourth Proportional to 142,103.34, 196,103.97 and 78,439.77

Step by Step Solution

1. Step 1: Write the proportion equation
   142,103.34 : 196,103.97 = 78,439.77 : x
2. Step 2: Convert to fraction form
   142,103.34/196,103.97 = 78,439.77/x
3. Step 3: Cross multiply
   142,103.34x = 196,103.97 × 78,439.77
4. Step 4: Simplify right side
   142,103.34x = 15,382,350,302.89
5. Step 5: Solve for x
   x = 15,382,350,302.89/142,103.34
6. Step 6: Final answer
   x = 108,247.63