Finding the Fourth Proportional to 2,205.18, 3,042.72 and 1,320.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,205.18 : 3,042.72 = 1,320.84 : x
2. Step 2: Convert to fraction form
   2,205.18/3,042.72 = 1,320.84/x
3. Step 3: Cross multiply
   2,205.18x = 3,042.72 × 1,320.84
4. Step 4: Simplify right side
   2,205.18x = 4,018,946.28
5. Step 5: Solve for x
   x = 4,018,946.28/2,205.18
6. Step 6: Final answer
   x = 1,822.50