Finding the Fourth Proportional to 2,740.10, 3,781.34 and 1,561.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,740.10 : 3,781.34 = 1,561.40 : x
2. Step 2: Convert to fraction form
   2,740.10/3,781.34 = 1,561.40/x
3. Step 3: Cross multiply
   2,740.10x = 3,781.34 × 1,561.40
4. Step 4: Simplify right side
   2,740.10x = 5,904,184.28
5. Step 5: Solve for x
   x = 5,904,184.28/2,740.10
6. Step 6: Final answer
   x = 2,154.73