Finding the Fourth Proportional to 196,914.72, 295,436.88 and 78,520.80

Step by Step Solution

1. Step 1: Write the proportion equation
   196,914.72 : 295,436.88 = 78,520.80 : x
2. Step 2: Convert to fraction form
   196,914.72/295,436.88 = 78,520.80/x
3. Step 3: Cross multiply
   196,914.72x = 295,436.88 × 78,520.80
4. Step 4: Simplify right side
   196,914.72x = 23,197,940,167.10
5. Step 5: Solve for x
   x = 23,197,940,167.10/196,914.72
6. Step 6: Final answer
   x = 117,807.04