Finding the Fourth Proportional to 1,078.51, 1,618.17 and 501.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.51 : 1,618.17 = 501.25 : x
2. Step 2: Convert to fraction form
   1,078.51/1,618.17 = 501.25/x
3. Step 3: Cross multiply
   1,078.51x = 1,618.17 × 501.25
4. Step 4: Simplify right side
   1,078.51x = 811,107.71
5. Step 5: Solve for x
   x = 811,107.71/1,078.51
6. Step 6: Final answer
   x = 752.06