Finding the Fourth Proportional to 10,443.49, 15,668.75 and 3,870.21

Step by Step Solution

1. Step 1: Write the proportion equation
   10,443.49 : 15,668.75 = 3,870.21 : x
2. Step 2: Convert to fraction form
   10,443.49/15,668.75 = 3,870.21/x
3. Step 3: Cross multiply
   10,443.49x = 15,668.75 × 3,870.21
4. Step 4: Simplify right side
   10,443.49x = 60,641,255.24
5. Step 5: Solve for x
   x = 60,641,255.24/10,443.49
6. Step 6: Final answer
   x = 5,806.61