Finding the Fourth Proportional to 2,805.30, 3,870.72 and 1,626.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,805.30 : 3,870.72 = 1,626.21 : x
2. Step 2: Convert to fraction form
   2,805.30/3,870.72 = 1,626.21/x
3. Step 3: Cross multiply
   2,805.30x = 3,870.72 × 1,626.21
4. Step 4: Simplify right side
   2,805.30x = 6,294,603.57
5. Step 5: Solve for x
   x = 6,294,603.57/2,805.30
6. Step 6: Final answer
   x = 2,243.83