Finding the Fourth Proportional to 2,047.78, 2,826.30 and 1,208.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,047.78 : 2,826.30 = 1,208.98 : x
2. Step 2: Convert to fraction form
   2,047.78/2,826.30 = 1,208.98/x
3. Step 3: Cross multiply
   2,047.78x = 2,826.30 × 1,208.98
4. Step 4: Simplify right side
   2,047.78x = 3,416,940.17
5. Step 5: Solve for x
   x = 3,416,940.17/2,047.78
6. Step 6: Final answer
   x = 1,668.61