Finding the Fourth Proportional to 1,041.72, 1,562.79 and 522.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,041.72 : 1,562.79 = 522.06 : x
2. Step 2: Convert to fraction form
   1,041.72/1,562.79 = 522.06/x
3. Step 3: Cross multiply
   1,041.72x = 1,562.79 × 522.06
4. Step 4: Simplify right side
   1,041.72x = 815,870.15
5. Step 5: Solve for x
   x = 815,870.15/1,041.72
6. Step 6: Final answer
   x = 783.20