Finding the Fourth Proportional to 1,866.18, 2,574.81 and 1,069.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,866.18 : 2,574.81 = 1,069.50 : x
2. Step 2: Convert to fraction form
   1,866.18/2,574.81 = 1,069.50/x
3. Step 3: Cross multiply
   1,866.18x = 2,574.81 × 1,069.50
4. Step 4: Simplify right side
   1,866.18x = 2,753,759.30
5. Step 5: Solve for x
   x = 2,753,759.30/1,866.18
6. Step 6: Final answer
   x = 1,475.61