Finding the Fourth Proportional to 2,549.80, 3,821.91 and 1,315.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,549.80 : 3,821.91 = 1,315.59 : x
2. Step 2: Convert to fraction form
   2,549.80/3,821.91 = 1,315.59/x
3. Step 3: Cross multiply
   2,549.80x = 3,821.91 × 1,315.59
4. Step 4: Simplify right side
   2,549.80x = 5,028,066.58
5. Step 5: Solve for x
   x = 5,028,066.58/2,549.80
6. Step 6: Final answer
   x = 1,971.95