Finding the Fourth Proportional to 1,433.30, 1,977.96 and 803.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.30 : 1,977.96 = 803.88 : x
2. Step 2: Convert to fraction form
   1,433.30/1,977.96 = 803.88/x
3. Step 3: Cross multiply
   1,433.30x = 1,977.96 × 803.88
4. Step 4: Simplify right side
   1,433.30x = 1,590,042.48
5. Step 5: Solve for x
   x = 1,590,042.48/1,433.30
6. Step 6: Final answer
   x = 1,109.36