Finding the Fourth Proportional to 1,016.34, 1,402.83 and 623.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.34 : 1,402.83 = 623.76 : x
2. Step 2: Convert to fraction form
   1,016.34/1,402.83 = 623.76/x
3. Step 3: Cross multiply
   1,016.34x = 1,402.83 × 623.76
4. Step 4: Simplify right side
   1,016.34x = 875,029.24
5. Step 5: Solve for x
   x = 875,029.24/1,016.34
6. Step 6: Final answer
   x = 860.96