Finding the Fourth Proportional to 3,551.02, 5,315.23 and 1,986.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,551.02 : 5,315.23 = 1,986.25 : x
2. Step 2: Convert to fraction form
   3,551.02/5,315.23 = 1,986.25/x
3. Step 3: Cross multiply
   3,551.02x = 5,315.23 × 1,986.25
4. Step 4: Simplify right side
   3,551.02x = 10,557,375.59
5. Step 5: Solve for x
   x = 10,557,375.59/3,551.02
6. Step 6: Final answer
   x = 2,973.05