Finding the Fourth Proportional to 2,457.52, 3,686.34 and 1,069.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,457.52 : 3,686.34 = 1,069.90 : x
2. Step 2: Convert to fraction form
   2,457.52/3,686.34 = 1,069.90/x
3. Step 3: Cross multiply
   2,457.52x = 3,686.34 × 1,069.90
4. Step 4: Simplify right side
   2,457.52x = 3,944,015.17
5. Step 5: Solve for x
   x = 3,944,015.17/2,457.52
6. Step 6: Final answer
   x = 1,604.88