Finding the Fourth Proportional to 1,079.15, 1,617.56 and 559.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,079.15 : 1,617.56 = 559.01 : x
2. Step 2: Convert to fraction form
   1,079.15/1,617.56 = 559.01/x
3. Step 3: Cross multiply
   1,079.15x = 1,617.56 × 559.01
4. Step 4: Simplify right side
   1,079.15x = 904,233.46
5. Step 5: Solve for x
   x = 904,233.46/1,079.15
6. Step 6: Final answer
   x = 837.92