Finding the Fourth Proportional to 2,077.61, 2,864.34 and 1,722.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,077.61 : 2,864.34 = 1,722.20 : x
2. Step 2: Convert to fraction form
   2,077.61/2,864.34 = 1,722.20/x
3. Step 3: Cross multiply
   2,077.61x = 2,864.34 × 1,722.20
4. Step 4: Simplify right side
   2,077.61x = 4,932,952.03
5. Step 5: Solve for x
   x = 4,932,952.03/2,077.61
6. Step 6: Final answer
   x = 2,374.35