Finding the Fourth Proportional to 1,664.74, 2,496.31 and 971.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,664.74 : 2,496.31 = 971.61 : x
2. Step 2: Convert to fraction form
   1,664.74/2,496.31 = 971.61/x
3. Step 3: Cross multiply
   1,664.74x = 2,496.31 × 971.61
4. Step 4: Simplify right side
   1,664.74x = 2,425,437.33
5. Step 5: Solve for x
   x = 2,425,437.33/1,664.74
6. Step 6: Final answer
   x = 1,456.95