Finding the Fourth Proportional to 1,645.59, 2,270.54 and 982.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,645.59 : 2,270.54 = 982.31 : x
2. Step 2: Convert to fraction form
   1,645.59/2,270.54 = 982.31/x
3. Step 3: Cross multiply
   1,645.59x = 2,270.54 × 982.31
4. Step 4: Simplify right side
   1,645.59x = 2,230,382.28
5. Step 5: Solve for x
   x = 2,230,382.28/1,645.59
6. Step 6: Final answer
   x = 1,355.37