Finding the Fourth Proportional to 1,291.08, 1,933.20 and 1,017.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,291.08 : 1,933.20 = 1,017.72 : x
2. Step 2: Convert to fraction form
   1,291.08/1,933.20 = 1,017.72/x
3. Step 3: Cross multiply
   1,291.08x = 1,933.20 × 1,017.72
4. Step 4: Simplify right side
   1,291.08x = 1,967,456.30
5. Step 5: Solve for x
   x = 1,967,456.30/1,291.08
6. Step 6: Final answer
   x = 1,523.88