Finding the Fourth Proportional to 2,596.48, 3,888.56 and 1,817.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,596.48 : 3,888.56 = 1,817.20 : x
2. Step 2: Convert to fraction form
   2,596.48/3,888.56 = 1,817.20/x
3. Step 3: Cross multiply
   2,596.48x = 3,888.56 × 1,817.20
4. Step 4: Simplify right side
   2,596.48x = 7,066,291.23
5. Step 5: Solve for x
   x = 7,066,291.23/2,596.48
6. Step 6: Final answer
   x = 2,721.49