Finding the Fourth Proportional to 2,111.88, 3,166.98 and 724.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.88 : 3,166.98 = 724.92 : x
2. Step 2: Convert to fraction form
   2,111.88/3,166.98 = 724.92/x
3. Step 3: Cross multiply
   2,111.88x = 3,166.98 × 724.92
4. Step 4: Simplify right side
   2,111.88x = 2,295,807.14
5. Step 5: Solve for x
   x = 2,295,807.14/2,111.88
6. Step 6: Final answer
   x = 1,087.09