Finding the Fourth Proportional to 2,389.48, 3,297.06 and 1,561

Step by Step Solution

1. Step 1: Write the proportion equation
   2,389.48 : 3,297.06 = 1,561 : x
2. Step 2: Convert to fraction form
   2,389.48/3,297.06 = 1,561/x
3. Step 3: Cross multiply
   2,389.48x = 3,297.06 × 1,561
4. Step 4: Simplify right side
   2,389.48x = 5,146,710.66
5. Step 5: Solve for x
   x = 5,146,710.66/2,389.48
6. Step 6: Final answer
   x = 2,153.90