Finding the Fourth Proportional to 2,870.39, 4,304.12 and 1,021.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.39 : 4,304.12 = 1,021.27 : x
2. Step 2: Convert to fraction form
   2,870.39/4,304.12 = 1,021.27/x
3. Step 3: Cross multiply
   2,870.39x = 4,304.12 × 1,021.27
4. Step 4: Simplify right side
   2,870.39x = 4,395,642.01
5. Step 5: Solve for x
   x = 4,395,642.01/2,870.39
6. Step 6: Final answer
   x = 1,531.37