Finding the Fourth Proportional to 1,030.50, 1,422.15 and 610.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,030.50 : 1,422.15 = 610.79 : x
2. Step 2: Convert to fraction form
   1,030.50/1,422.15 = 610.79/x
3. Step 3: Cross multiply
   1,030.50x = 1,422.15 × 610.79
4. Step 4: Simplify right side
   1,030.50x = 868,635.00
5. Step 5: Solve for x
   x = 868,635.00/1,030.50
6. Step 6: Final answer
   x = 842.93