Finding the Fourth Proportional to 1,291.32, 1,935.18 and 559.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,291.32 : 1,935.18 = 559.98 : x
2. Step 2: Convert to fraction form
   1,291.32/1,935.18 = 559.98/x
3. Step 3: Cross multiply
   1,291.32x = 1,935.18 × 559.98
4. Step 4: Simplify right side
   1,291.32x = 1,083,662.10
5. Step 5: Solve for x
   x = 1,083,662.10/1,291.32
6. Step 6: Final answer
   x = 839.19