Finding the Fourth Proportional to 3,189.20, 4,782.15 and 997.34

Step by Step Solution

1. Step 1: Write the proportion equation
   3,189.20 : 4,782.15 = 997.34 : x
2. Step 2: Convert to fraction form
   3,189.20/4,782.15 = 997.34/x
3. Step 3: Cross multiply
   3,189.20x = 4,782.15 × 997.34
4. Step 4: Simplify right side
   3,189.20x = 4,769,429.48
5. Step 5: Solve for x
   x = 4,769,429.48/3,189.20
6. Step 6: Final answer
   x = 1,495.49