Finding the Fourth Proportional to 1,990.10, 2,746.59 and 1,204.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,990.10 : 2,746.59 = 1,204.15 : x
2. Step 2: Convert to fraction form
   1,990.10/2,746.59 = 1,204.15/x
3. Step 3: Cross multiply
   1,990.10x = 2,746.59 × 1,204.15
4. Step 4: Simplify right side
   1,990.10x = 3,307,306.35
5. Step 5: Solve for x
   x = 3,307,306.35/1,990.10
6. Step 6: Final answer
   x = 1,661.88