Finding the Fourth Proportional to 2,111.50, 3,166.09 and 724.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.50 : 3,166.09 = 724.06 : x
2. Step 2: Convert to fraction form
   2,111.50/3,166.09 = 724.06/x
3. Step 3: Cross multiply
   2,111.50x = 3,166.09 × 724.06
4. Step 4: Simplify right side
   2,111.50x = 2,292,439.13
5. Step 5: Solve for x
   x = 2,292,439.13/2,111.50
6. Step 6: Final answer
   x = 1,085.69