Finding the Fourth Proportional to 2,740.86, 3,782.43 and 1,561.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,740.86 : 3,782.43 = 1,561.91 : x
2. Step 2: Convert to fraction form
   2,740.86/3,782.43 = 1,561.91/x
3. Step 3: Cross multiply
   2,740.86x = 3,782.43 × 1,561.91
4. Step 4: Simplify right side
   2,740.86x = 5,907,796.33
5. Step 5: Solve for x
   x = 5,907,796.33/2,740.86
6. Step 6: Final answer
   x = 2,155.45