Finding the Fourth Proportional to 1,597.98, 2,205.15 and 899.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,597.98 : 2,205.15 = 899.22 : x
2. Step 2: Convert to fraction form
   1,597.98/2,205.15 = 899.22/x
3. Step 3: Cross multiply
   1,597.98x = 2,205.15 × 899.22
4. Step 4: Simplify right side
   1,597.98x = 1,982,914.98
5. Step 5: Solve for x
   x = 1,982,914.98/1,597.98
6. Step 6: Final answer
   x = 1,240.89