Finding the Fourth Proportional to 1,016.12, 1,402.50 and 623.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.12 : 1,402.50 = 623.24 : x
2. Step 2: Convert to fraction form
   1,016.12/1,402.50 = 623.24/x
3. Step 3: Cross multiply
   1,016.12x = 1,402.50 × 623.24
4. Step 4: Simplify right side
   1,016.12x = 874,094.10
5. Step 5: Solve for x
   x = 874,094.10/1,016.12
6. Step 6: Final answer
   x = 860.23