Finding the Fourth Proportional to 2,005.53, 3,005.55 and 1,128.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,005.53 : 3,005.55 = 1,128.46 : x
2. Step 2: Convert to fraction form
   2,005.53/3,005.55 = 1,128.46/x
3. Step 3: Cross multiply
   2,005.53x = 3,005.55 × 1,128.46
4. Step 4: Simplify right side
   2,005.53x = 3,391,642.95
5. Step 5: Solve for x
   x = 3,391,642.95/2,005.53
6. Step 6: Final answer
   x = 1,691.15