Finding the Fourth Proportional to 1,016.27, 1,402.62 and 623.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.27 : 1,402.62 = 623.51 : x
2. Step 2: Convert to fraction form
   1,016.27/1,402.62 = 623.51/x
3. Step 3: Cross multiply
   1,016.27x = 1,402.62 × 623.51
4. Step 4: Simplify right side
   1,016.27x = 874,547.60
5. Step 5: Solve for x
   x = 874,547.60/1,016.27
6. Step 6: Final answer
   x = 860.55