Finding the Fourth Proportional to 3,707.61, 5,111.06 and 2,821.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,707.61 : 5,111.06 = 2,821.88 : x
2. Step 2: Convert to fraction form
   3,707.61/5,111.06 = 2,821.88/x
3. Step 3: Cross multiply
   3,707.61x = 5,111.06 × 2,821.88
4. Step 4: Simplify right side
   3,707.61x = 14,422,758.33
5. Step 5: Solve for x
   x = 14,422,758.33/3,707.61
6. Step 6: Final answer
   x = 3,890.04