Finding the Fourth Proportional to 142,008.20, 195,968.03 and 78,345.98

Step by Step Solution

1. Step 1: Write the proportion equation
   142,008.20 : 195,968.03 = 78,345.98 : x
2. Step 2: Convert to fraction form
   142,008.20/195,968.03 = 78,345.98/x
3. Step 3: Cross multiply
   142,008.20x = 195,968.03 × 78,345.98
4. Step 4: Simplify right side
   142,008.20x = 15,353,308,044.80
5. Step 5: Solve for x
   x = 15,353,308,044.80/142,008.20
6. Step 6: Final answer
   x = 108,115.64