Finding the Fourth Proportional to 814.55, 1,124.59 and 627.69

Step by Step Solution

1. Step 1: Write the proportion equation
   814.55 : 1,124.59 = 627.69 : x
2. Step 2: Convert to fraction form
   814.55/1,124.59 = 627.69/x
3. Step 3: Cross multiply
   814.55x = 1,124.59 × 627.69
4. Step 4: Simplify right side
   814.55x = 705,892.33
5. Step 5: Solve for x
   x = 705,892.33/814.55
6. Step 6: Final answer
   x = 866.61