Finding the Fourth Proportional to 2,216.01, 3,321.89 and 899.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.01 : 3,321.89 = 899.45 : x
2. Step 2: Convert to fraction form
   2,216.01/3,321.89 = 899.45/x
3. Step 3: Cross multiply
   2,216.01x = 3,321.89 × 899.45
4. Step 4: Simplify right side
   2,216.01x = 2,987,884.84
5. Step 5: Solve for x
   x = 2,987,884.84/2,216.01
6. Step 6: Final answer
   x = 1,348.32