Finding the Fourth Proportional to 2,429.80, 3,642.72 and 1,697.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,429.80 : 3,642.72 = 1,697.20 : x
2. Step 2: Convert to fraction form
   2,429.80/3,642.72 = 1,697.20/x
3. Step 3: Cross multiply
   2,429.80x = 3,642.72 × 1,697.20
4. Step 4: Simplify right side
   2,429.80x = 6,182,424.38
5. Step 5: Solve for x
   x = 6,182,424.38/2,429.80
6. Step 6: Final answer
   x = 2,544.42