Finding the Fourth Proportional to 3,128.03, 4,315.83 and 1,868.53

Step by Step Solution

1. Step 1: Write the proportion equation
   3,128.03 : 4,315.83 = 1,868.53 : x
2. Step 2: Convert to fraction form
   3,128.03/4,315.83 = 1,868.53/x
3. Step 3: Cross multiply
   3,128.03x = 4,315.83 × 1,868.53
4. Step 4: Simplify right side
   3,128.03x = 8,064,251.71
5. Step 5: Solve for x
   x = 8,064,251.71/3,128.03
6. Step 6: Final answer
   x = 2,578.06