Finding the Fourth Proportional to 143,046.96, 197,408.52 and 78,519.12

Step by Step Solution

1. Step 1: Write the proportion equation
   143,046.96 : 197,408.52 = 78,519.12 : x
2. Step 2: Convert to fraction form
   143,046.96/197,408.52 = 78,519.12/x
3. Step 3: Cross multiply
   143,046.96x = 197,408.52 × 78,519.12
4. Step 4: Simplify right side
   143,046.96x = 15,500,343,270.90
5. Step 5: Solve for x
   x = 15,500,343,270.90/143,046.96
6. Step 6: Final answer
   x = 108,358.42