Finding the Fourth Proportional to 14,259.65, 21,389.33 and 3,871.40

Step by Step Solution

1. Step 1: Write the proportion equation
   14,259.65 : 21,389.33 = 3,871.40 : x
2. Step 2: Convert to fraction form
   14,259.65/21,389.33 = 3,871.40/x
3. Step 3: Cross multiply
   14,259.65x = 21,389.33 × 3,871.40
4. Step 4: Simplify right side
   14,259.65x = 82,806,554.89
5. Step 5: Solve for x
   x = 82,806,554.89/14,259.65
6. Step 6: Final answer
   x = 5,807.06