Finding the Fourth Proportional to 2,542.61, 3,813.39 and 899.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,542.61 : 3,813.39 = 899.21 : x
2. Step 2: Convert to fraction form
   2,542.61/3,813.39 = 899.21/x
3. Step 3: Cross multiply
   2,542.61x = 3,813.39 × 899.21
4. Step 4: Simplify right side
   2,542.61x = 3,429,019.35
5. Step 5: Solve for x
   x = 3,429,019.35/2,542.61
6. Step 6: Final answer
   x = 1,348.62