Finding the Fourth Proportional to 1,081.61, 1,623.02 and 504.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.61 : 1,623.02 = 504.48 : x
2. Step 2: Convert to fraction form
   1,081.61/1,623.02 = 504.48/x
3. Step 3: Cross multiply
   1,081.61x = 1,623.02 × 504.48
4. Step 4: Simplify right side
   1,081.61x = 818,778.61
5. Step 5: Solve for x
   x = 818,778.61/1,081.61
6. Step 6: Final answer
   x = 757.00