Finding the Fourth Proportional to 1,868.63, 2,801.53 and 1,128.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,868.63 : 2,801.53 = 1,128.49 : x
2. Step 2: Convert to fraction form
   1,868.63/2,801.53 = 1,128.49/x
3. Step 3: Cross multiply
   1,868.63x = 2,801.53 × 1,128.49
4. Step 4: Simplify right side
   1,868.63x = 3,161,493.00
5. Step 5: Solve for x
   x = 3,161,493.00/1,868.63
6. Step 6: Final answer
   x = 1,691.88