Finding the Fourth Proportional to 1,086.21, 1,628.49 and 501.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.21 : 1,628.49 = 501.59 : x
2. Step 2: Convert to fraction form
   1,086.21/1,628.49 = 501.59/x
3. Step 3: Cross multiply
   1,086.21x = 1,628.49 × 501.59
4. Step 4: Simplify right side
   1,086.21x = 816,834.30
5. Step 5: Solve for x
   x = 816,834.30/1,086.21
6. Step 6: Final answer
   x = 752.00