Finding the Fourth Proportional to 1,433.09, 1,977.56 and 803.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.09 : 1,977.56 = 803.60 : x
2. Step 2: Convert to fraction form
   1,433.09/1,977.56 = 803.60/x
3. Step 3: Cross multiply
   1,433.09x = 1,977.56 × 803.60
4. Step 4: Simplify right side
   1,433.09x = 1,589,168.14
5. Step 5: Solve for x
   x = 1,589,168.14/1,433.09
6. Step 6: Final answer
   x = 1,108.91