Finding the Fourth Proportional to 1,645.52, 2,270.72 and 899.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,645.52 : 2,270.72 = 899.33 : x
2. Step 2: Convert to fraction form
   1,645.52/2,270.72 = 899.33/x
3. Step 3: Cross multiply
   1,645.52x = 2,270.72 × 899.33
4. Step 4: Simplify right side
   1,645.52x = 2,042,117.51
5. Step 5: Solve for x
   x = 2,042,117.51/1,645.52
6. Step 6: Final answer
   x = 1,241.02