Finding the Fourth Proportional to 1,169.57, 1,614.04 and 645.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,169.57 : 1,614.04 = 645.62 : x
2. Step 2: Convert to fraction form
   1,169.57/1,614.04 = 645.62/x
3. Step 3: Cross multiply
   1,169.57x = 1,614.04 × 645.62
4. Step 4: Simplify right side
   1,169.57x = 1,042,046.82
5. Step 5: Solve for x
   x = 1,042,046.82/1,169.57
6. Step 6: Final answer
   x = 890.96