Finding the Fourth Proportional to 1,433.22, 1,977.90 and 803.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.22 : 1,977.90 = 803.76 : x
2. Step 2: Convert to fraction form
   1,433.22/1,977.90 = 803.76/x
3. Step 3: Cross multiply
   1,433.22x = 1,977.90 × 803.76
4. Step 4: Simplify right side
   1,433.22x = 1,589,756.90
5. Step 5: Solve for x
   x = 1,589,756.90/1,433.22
6. Step 6: Final answer
   x = 1,109.22