Finding the Fourth Proportional to 2,045.49, 2,821.83 and 1,205.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,045.49 : 2,821.83 = 1,205.61 : x
2. Step 2: Convert to fraction form
   2,045.49/2,821.83 = 1,205.61/x
3. Step 3: Cross multiply
   2,045.49x = 2,821.83 × 1,205.61
4. Step 4: Simplify right side
   2,045.49x = 3,402,026.47
5. Step 5: Solve for x
   x = 3,402,026.47/2,045.49
6. Step 6: Final answer
   x = 1,663.18