Finding the Fourth Proportional to 2,836.03, 4,254.61 and 987.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,836.03 : 4,254.61 = 987.21 : x
2. Step 2: Convert to fraction form
   2,836.03/4,254.61 = 987.21/x
3. Step 3: Cross multiply
   2,836.03x = 4,254.61 × 987.21
4. Step 4: Simplify right side
   2,836.03x = 4,200,167.33
5. Step 5: Solve for x
   x = 4,200,167.33/2,836.03
6. Step 6: Final answer
   x = 1,481.00