Finding the Fourth Proportional to 3,525.15, 5,288.49 and 1,059.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,525.15 : 5,288.49 = 1,059.78 : x
2. Step 2: Convert to fraction form
   3,525.15/5,288.49 = 1,059.78/x
3. Step 3: Cross multiply
   3,525.15x = 5,288.49 × 1,059.78
4. Step 4: Simplify right side
   3,525.15x = 5,604,655.76
5. Step 5: Solve for x
   x = 5,604,655.76/3,525.15
6. Step 6: Final answer
   x = 1,589.90