Finding the Fourth Proportional to 1,603.09, 2,212.83 and 940.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,603.09 : 2,212.83 = 940.15 : x
2. Step 2: Convert to fraction form
   1,603.09/2,212.83 = 940.15/x
3. Step 3: Cross multiply
   1,603.09x = 2,212.83 × 940.15
4. Step 4: Simplify right side
   1,603.09x = 2,080,392.12
5. Step 5: Solve for x
   x = 2,080,392.12/1,603.09
6. Step 6: Final answer
   x = 1,297.74