Finding the Fourth Proportional to 1,314.68, 1,970.52 and 664.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,314.68 : 1,970.52 = 664.04 : x
2. Step 2: Convert to fraction form
   1,314.68/1,970.52 = 664.04/x
3. Step 3: Cross multiply
   1,314.68x = 1,970.52 × 664.04
4. Step 4: Simplify right side
   1,314.68x = 1,308,494.25
5. Step 5: Solve for x
   x = 1,308,494.25/1,314.68
6. Step 6: Final answer
   x = 995.30