Finding the Fourth Proportional to 1,436.74, 1,982.88 and 807.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.74 : 1,982.88 = 807.30 : x
2. Step 2: Convert to fraction form
   1,436.74/1,982.88 = 807.30/x
3. Step 3: Cross multiply
   1,436.74x = 1,982.88 × 807.30
4. Step 4: Simplify right side
   1,436.74x = 1,600,779.02
5. Step 5: Solve for x
   x = 1,600,779.02/1,436.74
6. Step 6: Final answer
   x = 1,114.18