Finding the Fourth Proportional to 1,789.69, 2,685.27 and 816.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,789.69 : 2,685.27 = 816.25 : x
2. Step 2: Convert to fraction form
   1,789.69/2,685.27 = 816.25/x
3. Step 3: Cross multiply
   1,789.69x = 2,685.27 × 816.25
4. Step 4: Simplify right side
   1,789.69x = 2,191,851.64
5. Step 5: Solve for x
   x = 2,191,851.64/1,789.69
6. Step 6: Final answer
   x = 1,224.71