Finding the Fourth Proportional to 2,868.93, 4,301.43 and 1,287.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,868.93 : 4,301.43 = 1,287.07 : x
2. Step 2: Convert to fraction form
   2,868.93/4,301.43 = 1,287.07/x
3. Step 3: Cross multiply
   2,868.93x = 4,301.43 × 1,287.07
4. Step 4: Simplify right side
   2,868.93x = 5,536,230.76
5. Step 5: Solve for x
   x = 5,536,230.76/2,868.93
6. Step 6: Final answer
   x = 1,929.72