Finding the Fourth Proportional to 1,309.97, 1,964.56 and 529.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,309.97 : 1,964.56 = 529.72 : x
2. Step 2: Convert to fraction form
   1,309.97/1,964.56 = 529.72/x
3. Step 3: Cross multiply
   1,309.97x = 1,964.56 × 529.72
4. Step 4: Simplify right side
   1,309.97x = 1,040,666.72
5. Step 5: Solve for x
   x = 1,040,666.72/1,309.97
6. Step 6: Final answer
   x = 794.42