Finding the Fourth Proportional to 1,010.98, 1,394.85 and 617.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,010.98 : 1,394.85 = 617.59 : x
2. Step 2: Convert to fraction form
   1,010.98/1,394.85 = 617.59/x
3. Step 3: Cross multiply
   1,010.98x = 1,394.85 × 617.59
4. Step 4: Simplify right side
   1,010.98x = 861,445.41
5. Step 5: Solve for x
   x = 861,445.41/1,010.98
6. Step 6: Final answer
   x = 852.09