Finding the Fourth Proportional to 1,065.34, 1,470.04 and 617.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,065.34 : 1,470.04 = 617.21 : x
2. Step 2: Convert to fraction form
   1,065.34/1,470.04 = 617.21/x
3. Step 3: Cross multiply
   1,065.34x = 1,470.04 × 617.21
4. Step 4: Simplify right side
   1,065.34x = 907,320.54
5. Step 5: Solve for x
   x = 907,320.54/1,065.34
6. Step 6: Final answer
   x = 851.67