Finding the Fourth Proportional to 1,003.17, 1,390.71 and 950.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.17 : 1,390.71 = 950.48 : x
2. Step 2: Convert to fraction form
   1,003.17/1,390.71 = 950.48/x
3. Step 3: Cross multiply
   1,003.17x = 1,390.71 × 950.48
4. Step 4: Simplify right side
   1,003.17x = 1,321,835.09
5. Step 5: Solve for x
   x = 1,321,835.09/1,003.17
6. Step 6: Final answer
   x = 1,317.66