Finding the Fourth Proportional to 1,111.08, 1,533.39 and 613.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.08 : 1,533.39 = 613.82 : x
2. Step 2: Convert to fraction form
   1,111.08/1,533.39 = 613.82/x
3. Step 3: Cross multiply
   1,111.08x = 1,533.39 × 613.82
4. Step 4: Simplify right side
   1,111.08x = 941,217.78
5. Step 5: Solve for x
   x = 941,217.78/1,111.08
6. Step 6: Final answer
   x = 847.12