Finding the Fourth Proportional to 1,644.15, 2,268.72 and 971.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,644.15 : 2,268.72 = 971.94 : x
2. Step 2: Convert to fraction form
   1,644.15/2,268.72 = 971.94/x
3. Step 3: Cross multiply
   1,644.15x = 2,268.72 × 971.94
4. Step 4: Simplify right side
   1,644.15x = 2,205,059.72
5. Step 5: Solve for x
   x = 2,205,059.72/1,644.15
6. Step 6: Final answer
   x = 1,341.15