Finding the Fourth Proportional to 1,010.28, 1,393.47 and 617.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,010.28 : 1,393.47 = 617.52 : x
2. Step 2: Convert to fraction form
   1,010.28/1,393.47 = 617.52/x
3. Step 3: Cross multiply
   1,010.28x = 1,393.47 × 617.52
4. Step 4: Simplify right side
   1,010.28x = 860,495.59
5. Step 5: Solve for x
   x = 860,495.59/1,010.28
6. Step 6: Final answer
   x = 851.74