Finding the Fourth Proportional to 2,528.25, 3,487.28 and 1,642.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,528.25 : 3,487.28 = 1,642.47 : x
2. Step 2: Convert to fraction form
   2,528.25/3,487.28 = 1,642.47/x
3. Step 3: Cross multiply
   2,528.25x = 3,487.28 × 1,642.47
4. Step 4: Simplify right side
   2,528.25x = 5,727,744.57
5. Step 5: Solve for x
   x = 5,727,744.57/2,528.25
6. Step 6: Final answer
   x = 2,265.50