Finding the Fourth Proportional to 143,402.88, 197,900.76 and 78,874.83

Step by Step Solution

1. Step 1: Write the proportion equation
   143,402.88 : 197,900.76 = 78,874.83 : x
2. Step 2: Convert to fraction form
   143,402.88/197,900.76 = 78,874.83/x
3. Step 3: Cross multiply
   143,402.88x = 197,900.76 × 78,874.83
4. Step 4: Simplify right side
   143,402.88x = 15,609,389,839.78
5. Step 5: Solve for x
   x = 15,609,389,839.78/143,402.88
6. Step 6: Final answer
   x = 108,849.91