Finding the Fourth Proportional to 1,111.23, 1,533.46 and 613.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.23 : 1,533.46 = 613.83 : x
2. Step 2: Convert to fraction form
   1,111.23/1,533.46 = 613.83/x
3. Step 3: Cross multiply
   1,111.23x = 1,533.46 × 613.83
4. Step 4: Simplify right side
   1,111.23x = 941,280.68
5. Step 5: Solve for x
   x = 941,280.68/1,111.23
6. Step 6: Final answer
   x = 847.07