Finding the Fourth Proportional to 2,740.21, 3,781.73 and 1,561.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,740.21 : 3,781.73 = 1,561.34 : x
2. Step 2: Convert to fraction form
   2,740.21/3,781.73 = 1,561.34/x
3. Step 3: Cross multiply
   2,740.21x = 3,781.73 × 1,561.34
4. Step 4: Simplify right side
   2,740.21x = 5,904,579.68
5. Step 5: Solve for x
   x = 5,904,579.68/2,740.21
6. Step 6: Final answer
   x = 2,154.79