Finding the Fourth Proportional to 1,802.72, 2,487.74 and 1,016.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,802.72 : 2,487.74 = 1,016.78 : x
2. Step 2: Convert to fraction form
   1,802.72/2,487.74 = 1,016.78/x
3. Step 3: Cross multiply
   1,802.72x = 2,487.74 × 1,016.78
4. Step 4: Simplify right side
   1,802.72x = 2,529,484.28
5. Step 5: Solve for x
   x = 2,529,484.28/1,802.72
6. Step 6: Final answer
   x = 1,403.15