Finding the Fourth Proportional to 1,065.74, 1,470.69 and 617.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,065.74 : 1,470.69 = 617.69 : x
2. Step 2: Convert to fraction form
   1,065.74/1,470.69 = 617.69/x
3. Step 3: Cross multiply
   1,065.74x = 1,470.69 × 617.69
4. Step 4: Simplify right side
   1,065.74x = 908,434.18
5. Step 5: Solve for x
   x = 908,434.18/1,065.74
6. Step 6: Final answer
   x = 852.40