Finding the Fourth Proportional to 2,528.72, 3,489.73 and 1,409.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,528.72 : 3,489.73 = 1,409.81 : x
2. Step 2: Convert to fraction form
   2,528.72/3,489.73 = 1,409.81/x
3. Step 3: Cross multiply
   2,528.72x = 3,489.73 × 1,409.81
4. Step 4: Simplify right side
   2,528.72x = 4,919,843.21
5. Step 5: Solve for x
   x = 4,919,843.21/2,528.72
6. Step 6: Final answer
   x = 1,945.59