Finding the Fourth Proportional to 2,111.69, 3,168.00 and 724.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.69 : 3,168.00 = 724.99 : x
2. Step 2: Convert to fraction form
   2,111.69/3,168.00 = 724.99/x
3. Step 3: Cross multiply
   2,111.69x = 3,168.00 × 724.99
4. Step 4: Simplify right side
   2,111.69x = 2,296,764.70
5. Step 5: Solve for x
   x = 2,296,764.70/2,111.69
6. Step 6: Final answer
   x = 1,087.65