Finding the Fourth Proportional to 2,528.38, 3,489.12 and 1,409.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,528.38 : 3,489.12 = 1,409.30 : x
2. Step 2: Convert to fraction form
   2,528.38/3,489.12 = 1,409.30/x
3. Step 3: Cross multiply
   2,528.38x = 3,489.12 × 1,409.30
4. Step 4: Simplify right side
   2,528.38x = 4,917,216.82
5. Step 5: Solve for x
   x = 4,917,216.82/2,528.38
6. Step 6: Final answer
   x = 1,944.81