Finding the Fourth Proportional to 268,499.16, 402,766.52 and 78,976.48

Step by Step Solution

1. Step 1: Write the proportion equation
   268,499.16 : 402,766.52 = 78,976.48 : x
2. Step 2: Convert to fraction form
   268,499.16/402,766.52 = 78,976.48/x
3. Step 3: Cross multiply
   268,499.16x = 402,766.52 × 78,976.48
4. Step 4: Simplify right side
   268,499.16x = 31,809,082,011.45
5. Step 5: Solve for x
   x = 31,809,082,011.45/268,499.16
6. Step 6: Final answer
   x = 118,469.95