Finding the Fourth Proportional to 1,111.07, 1,533.24 and 613.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.07 : 1,533.24 = 613.73 : x
2. Step 2: Convert to fraction form
   1,111.07/1,533.24 = 613.73/x
3. Step 3: Cross multiply
   1,111.07x = 1,533.24 × 613.73
4. Step 4: Simplify right side
   1,111.07x = 940,987.72
5. Step 5: Solve for x
   x = 940,987.72/1,111.07
6. Step 6: Final answer
   x = 846.92