Finding the Fourth Proportional to 141,678.78, 195,518.17 and 78,022.50

Step by Step Solution

1. Step 1: Write the proportion equation
   141,678.78 : 195,518.17 = 78,022.50 : x
2. Step 2: Convert to fraction form
   141,678.78/195,518.17 = 78,022.50/x
3. Step 3: Cross multiply
   141,678.78x = 195,518.17 × 78,022.50
4. Step 4: Simplify right side
   141,678.78x = 15,254,816,418.83
5. Step 5: Solve for x
   x = 15,254,816,418.83/141,678.78
6. Step 6: Final answer
   x = 107,671.85