Finding the Fourth Proportional to 1,403.72, 1,937.20 and 844.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,403.72 : 1,937.20 = 844.45 : x
2. Step 2: Convert to fraction form
   1,403.72/1,937.20 = 844.45/x
3. Step 3: Cross multiply
   1,403.72x = 1,937.20 × 844.45
4. Step 4: Simplify right side
   1,403.72x = 1,635,868.54
5. Step 5: Solve for x
   x = 1,635,868.54/1,403.72
6. Step 6: Final answer
   x = 1,165.38