Finding the Fourth Proportional to 2,740.71, 3,782.16 and 1,561.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,740.71 : 3,782.16 = 1,561.79 : x
2. Step 2: Convert to fraction form
   2,740.71/3,782.16 = 1,561.79/x
3. Step 3: Cross multiply
   2,740.71x = 3,782.16 × 1,561.79
4. Step 4: Simplify right side
   2,740.71x = 5,906,920.76
5. Step 5: Solve for x
   x = 5,906,920.76/2,740.71
6. Step 6: Final answer
   x = 2,155.25