Finding the Fourth Proportional to 1,065.10, 1,469.85 and 623.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,065.10 : 1,469.85 = 623.27 : x
2. Step 2: Convert to fraction form
   1,065.10/1,469.85 = 623.27/x
3. Step 3: Cross multiply
   1,065.10x = 1,469.85 × 623.27
4. Step 4: Simplify right side
   1,065.10x = 916,110.61
5. Step 5: Solve for x
   x = 916,110.61/1,065.10
6. Step 6: Final answer
   x = 860.12