Finding the Fourth Proportional to 1,016.63, 1,401.59 and 807.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.63 : 1,401.59 = 807.49 : x
2. Step 2: Convert to fraction form
   1,016.63/1,401.59 = 807.49/x
3. Step 3: Cross multiply
   1,016.63x = 1,401.59 × 807.49
4. Step 4: Simplify right side
   1,016.63x = 1,131,773.08
5. Step 5: Solve for x
   x = 1,131,773.08/1,016.63
6. Step 6: Final answer
   x = 1,113.26