Finding the Fourth Proportional to 141,894.72, 195,816.21 and 78,234.78

Step by Step Solution

1. Step 1: Write the proportion equation
   141,894.72 : 195,816.21 = 78,234.78 : x
2. Step 2: Convert to fraction form
   141,894.72/195,816.21 = 78,234.78/x
3. Step 3: Cross multiply
   141,894.72x = 195,816.21 × 78,234.78
4. Step 4: Simplify right side
   141,894.72x = 15,319,638,109.78
5. Step 5: Solve for x
   x = 15,319,638,109.78/141,894.72
6. Step 6: Final answer
   x = 107,964.82