Finding the Fourth Proportional to 1,109.54, 1,531.16 and 612.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.54 : 1,531.16 = 612.22 : x
2. Step 2: Convert to fraction form
   1,109.54/1,531.16 = 612.22/x
3. Step 3: Cross multiply
   1,109.54x = 1,531.16 × 612.22
4. Step 4: Simplify right side
   1,109.54x = 937,406.78
5. Step 5: Solve for x
   x = 937,406.78/1,109.54
6. Step 6: Final answer
   x = 844.86