Finding the Fourth Proportional to 1,065.68, 1,470.86 and 617.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,065.68 : 1,470.86 = 617.63 : x
2. Step 2: Convert to fraction form
   1,065.68/1,470.86 = 617.63/x
3. Step 3: Cross multiply
   1,065.68x = 1,470.86 × 617.63
4. Step 4: Simplify right side
   1,065.68x = 908,436.82
5. Step 5: Solve for x
   x = 908,436.82/1,065.68
6. Step 6: Final answer
   x = 852.45