Finding the Fourth Proportional to 1,019.67, 1,406.84 and 626.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.67 : 1,406.84 = 626.55 : x
2. Step 2: Convert to fraction form
   1,019.67/1,406.84 = 626.55/x
3. Step 3: Cross multiply
   1,019.67x = 1,406.84 × 626.55
4. Step 4: Simplify right side
   1,019.67x = 881,452.47
5. Step 5: Solve for x
   x = 881,452.47/1,019.67
6. Step 6: Final answer
   x = 864.45