Finding the Fourth Proportional to 2,761.56, 4,142.82 and 1,117.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,761.56 : 4,142.82 = 1,117.20 : x
2. Step 2: Convert to fraction form
   2,761.56/4,142.82 = 1,117.20/x
3. Step 3: Cross multiply
   2,761.56x = 4,142.82 × 1,117.20
4. Step 4: Simplify right side
   2,761.56x = 4,628,358.50
5. Step 5: Solve for x
   x = 4,628,358.50/2,761.56
6. Step 6: Final answer
   x = 1,675.99