Finding the Fourth Proportional to 1,664.17, 2,296.91 and 956.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,664.17 : 2,296.91 = 956.12 : x
2. Step 2: Convert to fraction form
   1,664.17/2,296.91 = 956.12/x
3. Step 3: Cross multiply
   1,664.17x = 2,296.91 × 956.12
4. Step 4: Simplify right side
   1,664.17x = 2,196,121.59
5. Step 5: Solve for x
   x = 2,196,121.59/1,664.17
6. Step 6: Final answer
   x = 1,319.65