Finding the Fourth Proportional to 2,761.88, 4,118.43 and 2,561.00

Step by Step Solution

1. Step 1: Write the proportion equation
   2,761.88 : 4,118.43 = 2,561.00 : x
2. Step 2: Convert to fraction form
   2,761.88/4,118.43 = 2,561.00/x
3. Step 3: Cross multiply
   2,761.88x = 4,118.43 × 2,561.00
4. Step 4: Simplify right side
   2,761.88x = 10,547,278.64
5. Step 5: Solve for x
   x = 10,547,278.64/2,761.88
6. Step 6: Final answer
   x = 3,818.88