Finding the Fourth Proportional to 1,111.15, 1,533.41 and 613.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.15 : 1,533.41 = 613.83 : x
2. Step 2: Convert to fraction form
   1,111.15/1,533.41 = 613.83/x
3. Step 3: Cross multiply
   1,111.15x = 1,533.41 × 613.83
4. Step 4: Simplify right side
   1,111.15x = 941,253.06
5. Step 5: Solve for x
   x = 941,253.06/1,111.15
6. Step 6: Final answer
   x = 847.10