Finding the Fourth Proportional to 1,597.69, 2,204.70 and 899.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,597.69 : 2,204.70 = 899.20 : x
2. Step 2: Convert to fraction form
   1,597.69/2,204.70 = 899.20/x
3. Step 3: Cross multiply
   1,597.69x = 2,204.70 × 899.20
4. Step 4: Simplify right side
   1,597.69x = 1,982,455.22
5. Step 5: Solve for x
   x = 1,982,455.22/1,597.69
6. Step 6: Final answer
   x = 1,240.83