Finding the Fourth Proportional to 1,436.60, 1,982.45 and 807.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.60 : 1,982.45 = 807.23 : x
2. Step 2: Convert to fraction form
   1,436.60/1,982.45 = 807.23/x
3. Step 3: Cross multiply
   1,436.60x = 1,982.45 × 807.23
4. Step 4: Simplify right side
   1,436.60x = 1,600,300.09
5. Step 5: Solve for x
   x = 1,600,300.09/1,436.60
6. Step 6: Final answer
   x = 1,113.95