Finding the Fourth Proportional to 3,317.69, 4,976.42 and 818.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,317.69 : 4,976.42 = 818.89 : x
2. Step 2: Convert to fraction form
   3,317.69/4,976.42 = 818.89/x
3. Step 3: Cross multiply
   3,317.69x = 4,976.42 × 818.89
4. Step 4: Simplify right side
   3,317.69x = 4,075,130.18
5. Step 5: Solve for x
   x = 4,075,130.18/3,317.69
6. Step 6: Final answer
   x = 1,228.30