Finding the Fourth Proportional to 1,291.74, 1,935.72 and 803.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,291.74 : 1,935.72 = 803.31 : x
2. Step 2: Convert to fraction form
   1,291.74/1,935.72 = 803.31/x
3. Step 3: Cross multiply
   1,291.74x = 1,935.72 × 803.31
4. Step 4: Simplify right side
   1,291.74x = 1,554,983.23
5. Step 5: Solve for x
   x = 1,554,983.23/1,291.74
6. Step 6: Final answer
   x = 1,203.79