Finding the Fourth Proportional to 1,065.29, 1,470.15 and 623.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,065.29 : 1,470.15 = 623.16 : x
2. Step 2: Convert to fraction form
   1,065.29/1,470.15 = 623.16/x
3. Step 3: Cross multiply
   1,065.29x = 1,470.15 × 623.16
4. Step 4: Simplify right side
   1,065.29x = 916,138.67
5. Step 5: Solve for x
   x = 916,138.67/1,065.29
6. Step 6: Final answer
   x = 859.99