Finding the Fourth Proportional to 1,404.05, 1,937.72 and 806.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.05 : 1,937.72 = 806.63 : x
2. Step 2: Convert to fraction form
   1,404.05/1,937.72 = 806.63/x
3. Step 3: Cross multiply
   1,404.05x = 1,937.72 × 806.63
4. Step 4: Simplify right side
   1,404.05x = 1,563,022.68
5. Step 5: Solve for x
   x = 1,563,022.68/1,404.05
6. Step 6: Final answer
   x = 1,113.22