Finding the Fourth Proportional to 1,317.38, 1,815.49 and 943.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,317.38 : 1,815.49 = 943.72 : x
2. Step 2: Convert to fraction form
   1,317.38/1,815.49 = 943.72/x
3. Step 3: Cross multiply
   1,317.38x = 1,815.49 × 943.72
4. Step 4: Simplify right side
   1,317.38x = 1,713,308.21
5. Step 5: Solve for x
   x = 1,713,308.21/1,317.38
6. Step 6: Final answer
   x = 1,300.54