Finding the Fourth Proportional to 1,436.78, 1,982.79 and 807.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.78 : 1,982.79 = 807.46 : x
2. Step 2: Convert to fraction form
   1,436.78/1,982.79 = 807.46/x
3. Step 3: Cross multiply
   1,436.78x = 1,982.79 × 807.46
4. Step 4: Simplify right side
   1,436.78x = 1,601,018.66
5. Step 5: Solve for x
   x = 1,601,018.66/1,436.78
6. Step 6: Final answer
   x = 1,114.31