Finding the Fourth Proportional to 1,087.98, 1,501.43 and 622.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,087.98 : 1,501.43 = 622.23 : x
2. Step 2: Convert to fraction form
   1,087.98/1,501.43 = 622.23/x
3. Step 3: Cross multiply
   1,087.98x = 1,501.43 × 622.23
4. Step 4: Simplify right side
   1,087.98x = 934,231.68
5. Step 5: Solve for x
   x = 934,231.68/1,087.98
6. Step 6: Final answer
   x = 858.68