Finding the Fourth Proportional to 2,528.52, 3,488.04 and 1,688.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,528.52 : 3,488.04 = 1,688.28 : x
2. Step 2: Convert to fraction form
   2,528.52/3,488.04 = 1,688.28/x
3. Step 3: Cross multiply
   2,528.52x = 3,488.04 × 1,688.28
4. Step 4: Simplify right side
   2,528.52x = 5,888,788.17
5. Step 5: Solve for x
   x = 5,888,788.17/2,528.52
6. Step 6: Final answer
   x = 2,328.95