Finding the Fourth Proportional to 1,305.61, 1,800.81 and 801.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,305.61 : 1,800.81 = 801.49 : x
2. Step 2: Convert to fraction form
   1,305.61/1,800.81 = 801.49/x
3. Step 3: Cross multiply
   1,305.61x = 1,800.81 × 801.49
4. Step 4: Simplify right side
   1,305.61x = 1,443,328.71
5. Step 5: Solve for x
   x = 1,443,328.71/1,305.61
6. Step 6: Final answer
   x = 1,105.48