Finding the Fourth Proportional to 1,819.82, 2,729.83 and 521.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,819.82 : 2,729.83 = 521.25 : x
2. Step 2: Convert to fraction form
   1,819.82/2,729.83 = 521.25/x
3. Step 3: Cross multiply
   1,819.82x = 2,729.83 × 521.25
4. Step 4: Simplify right side
   1,819.82x = 1,422,922.58
5. Step 5: Solve for x
   x = 1,422,922.58/1,819.82
6. Step 6: Final answer
   x = 781.91