Finding the Fourth Proportional to 1,087.83, 1,501.34 and 622.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,087.83 : 1,501.34 = 622.17 : x
2. Step 2: Convert to fraction form
   1,087.83/1,501.34 = 622.17/x
3. Step 3: Cross multiply
   1,087.83x = 1,501.34 × 622.17
4. Step 4: Simplify right side
   1,087.83x = 934,085.60
5. Step 5: Solve for x
   x = 934,085.60/1,087.83
6. Step 6: Final answer
   x = 858.67