Finding the Fourth Proportional to 1,297.98, 1,947.18 and 517.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,297.98 : 1,947.18 = 517.98 : x
2. Step 2: Convert to fraction form
   1,297.98/1,947.18 = 517.98/x
3. Step 3: Cross multiply
   1,297.98x = 1,947.18 × 517.98
4. Step 4: Simplify right side
   1,297.98x = 1,008,600.30
5. Step 5: Solve for x
   x = 1,008,600.30/1,297.98
6. Step 6: Final answer
   x = 777.05