Finding the Fourth Proportional to 1,664.40, 2,296.98 and 956.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,664.40 : 2,296.98 = 956.47 : x
2. Step 2: Convert to fraction form
   1,664.40/2,296.98 = 956.47/x
3. Step 3: Cross multiply
   1,664.40x = 2,296.98 × 956.47
4. Step 4: Simplify right side
   1,664.40x = 2,196,991.86
5. Step 5: Solve for x
   x = 2,196,991.86/1,664.40
6. Step 6: Final answer
   x = 1,319.99