Finding the Fourth Proportional to 142,106.04, 196,106.60 and 78,443.89

Step by Step Solution

1. Step 1: Write the proportion equation
   142,106.04 : 196,106.60 = 78,443.89 : x
2. Step 2: Convert to fraction form
   142,106.04/196,106.60 = 78,443.89/x
3. Step 3: Cross multiply
   142,106.04x = 196,106.60 × 78,443.89
4. Step 4: Simplify right side
   142,106.04x = 15,383,363,676.19
5. Step 5: Solve for x
   x = 15,383,363,676.19/142,106.04
6. Step 6: Final answer
   x = 108,252.71