Finding the Fourth Proportional to 3,528.52, 5,281.82 and 2,605.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,528.52 : 5,281.82 = 2,605.12 : x
2. Step 2: Convert to fraction form
   3,528.52/5,281.82 = 2,605.12/x
3. Step 3: Cross multiply
   3,528.52x = 5,281.82 × 2,605.12
4. Step 4: Simplify right side
   3,528.52x = 13,759,774.92
5. Step 5: Solve for x
   x = 13,759,774.92/3,528.52
6. Step 6: Final answer
   x = 3,899.59