Finding the Fourth Proportional to 1,111.11, 1,533.28 and 613.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.11 : 1,533.28 = 613.74 : x
2. Step 2: Convert to fraction form
   1,111.11/1,533.28 = 613.74/x
3. Step 3: Cross multiply
   1,111.11x = 1,533.28 × 613.74
4. Step 4: Simplify right side
   1,111.11x = 941,039.48
5. Step 5: Solve for x
   x = 941,039.48/1,111.11
6. Step 6: Final answer
   x = 846.94