Finding the Fourth Proportional to 1,111.04, 1,533.18 and 613.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.04 : 1,533.18 = 613.59 : x
2. Step 2: Convert to fraction form
   1,111.04/1,533.18 = 613.59/x
3. Step 3: Cross multiply
   1,111.04x = 1,533.18 × 613.59
4. Step 4: Simplify right side
   1,111.04x = 940,743.92
5. Step 5: Solve for x
   x = 940,743.92/1,111.04
6. Step 6: Final answer
   x = 846.72