Finding the Fourth Proportional to 141,681, 195,519.78 and 78,018.65

Step by Step Solution

1. Step 1: Write the proportion equation
   141,681 : 195,519.78 = 78,018.65 : x
2. Step 2: Convert to fraction form
   141,681/195,519.78 = 78,018.65/x
3. Step 3: Cross multiply
   141,681x = 195,519.78 × 78,018.65
4. Step 4: Simplify right side
   141,681x = 15,254,188,306.30
5. Step 5: Solve for x
   x = 15,254,188,306.30/141,681
6. Step 6: Final answer
   x = 107,665.73