Finding the Fourth Proportional to 1,016.60, 1,402.79 and 623.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.60 : 1,402.79 = 623.52 : x
2. Step 2: Convert to fraction form
   1,016.60/1,402.79 = 623.52/x
3. Step 3: Cross multiply
   1,016.60x = 1,402.79 × 623.52
4. Step 4: Simplify right side
   1,016.60x = 874,664.50
5. Step 5: Solve for x
   x = 874,664.50/1,016.60
6. Step 6: Final answer
   x = 860.39