Finding the Fourth Proportional to 2,173.85, 3,261.72 and 1,077.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,173.85 : 3,261.72 = 1,077.59 : x
2. Step 2: Convert to fraction form
   2,173.85/3,261.72 = 1,077.59/x
3. Step 3: Cross multiply
   2,173.85x = 3,261.72 × 1,077.59
4. Step 4: Simplify right side
   2,173.85x = 3,514,796.85
5. Step 5: Solve for x
   x = 3,514,796.85/2,173.85
6. Step 6: Final answer
   x = 1,616.85