Finding the Fourth Proportional to 1,976.29, 2,728.61 and 1,230.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,976.29 : 2,728.61 = 1,230.55 : x
2. Step 2: Convert to fraction form
   1,976.29/2,728.61 = 1,230.55/x
3. Step 3: Cross multiply
   1,976.29x = 2,728.61 × 1,230.55
4. Step 4: Simplify right side
   1,976.29x = 3,357,684.88
5. Step 5: Solve for x
   x = 3,357,684.88/1,976.29
6. Step 6: Final answer
   x = 1,698.98