Finding the Fourth Proportional to 1,030.50, 1,422.45 and 616.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,030.50 : 1,422.45 = 616.50 : x
2. Step 2: Convert to fraction form
   1,030.50/1,422.45 = 616.50/x
3. Step 3: Cross multiply
   1,030.50x = 1,422.45 × 616.50
4. Step 4: Simplify right side
   1,030.50x = 876,940.43
5. Step 5: Solve for x
   x = 876,940.43/1,030.50
6. Step 6: Final answer
   x = 850.99