Finding the Fourth Proportional to 1,109.38, 1,531.02 and 612.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.38 : 1,531.02 = 612.06 : x
2. Step 2: Convert to fraction form
   1,109.38/1,531.02 = 612.06/x
3. Step 3: Cross multiply
   1,109.38x = 1,531.02 × 612.06
4. Step 4: Simplify right side
   1,109.38x = 937,076.10
5. Step 5: Solve for x
   x = 937,076.10/1,109.38
6. Step 6: Final answer
   x = 844.68