Finding the Fourth Proportional to 2,699.89, 3,726.78 and 1,581.19

Step by Step Solution

1. Step 1: Write the proportion equation
   2,699.89 : 3,726.78 = 1,581.19 : x
2. Step 2: Convert to fraction form
   2,699.89/3,726.78 = 1,581.19/x
3. Step 3: Cross multiply
   2,699.89x = 3,726.78 × 1,581.19
4. Step 4: Simplify right side
   2,699.89x = 5,892,737.95
5. Step 5: Solve for x
   x = 5,892,737.95/2,699.89
6. Step 6: Final answer
   x = 2,182.58