Finding the Fourth Proportional to 1,531.22, 2,113.89 and 1,229.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,531.22 : 2,113.89 = 1,229.18 : x
2. Step 2: Convert to fraction form
   1,531.22/2,113.89 = 1,229.18/x
3. Step 3: Cross multiply
   1,531.22x = 2,113.89 × 1,229.18
4. Step 4: Simplify right side
   1,531.22x = 2,598,351.31
5. Step 5: Solve for x
   x = 2,598,351.31/1,531.22
6. Step 6: Final answer
   x = 1,696.92