Finding the Fourth Proportional to 1,436.64, 1,982.52 and 807.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.64 : 1,982.52 = 807.17 : x
2. Step 2: Convert to fraction form
   1,436.64/1,982.52 = 807.17/x
3. Step 3: Cross multiply
   1,436.64x = 1,982.52 × 807.17
4. Step 4: Simplify right side
   1,436.64x = 1,600,230.67
5. Step 5: Solve for x
   x = 1,600,230.67/1,436.64
6. Step 6: Final answer
   x = 1,113.87