Finding the Fourth Proportional to 1,065.06, 1,469.88 and 623.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,065.06 : 1,469.88 = 623.10 : x
2. Step 2: Convert to fraction form
   1,065.06/1,469.88 = 623.10/x
3. Step 3: Cross multiply
   1,065.06x = 1,469.88 × 623.10
4. Step 4: Simplify right side
   1,065.06x = 915,882.23
5. Step 5: Solve for x
   x = 915,882.23/1,065.06
6. Step 6: Final answer
   x = 859.93