Finding the Fourth Proportional to 1,065.27, 1,470.30 and 623.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,065.27 : 1,470.30 = 623.28 : x
2. Step 2: Convert to fraction form
   1,065.27/1,470.30 = 623.28/x
3. Step 3: Cross multiply
   1,065.27x = 1,470.30 × 623.28
4. Step 4: Simplify right side
   1,065.27x = 916,411.76
5. Step 5: Solve for x
   x = 916,411.76/1,065.27
6. Step 6: Final answer
   x = 860.26