Finding the Fourth Proportional to 3,815.02, 5,687.78 and 3,718.99

Step by Step Solution

1. Step 1: Write the proportion equation
   3,815.02 : 5,687.78 = 3,718.99 : x
2. Step 2: Convert to fraction form
   3,815.02/5,687.78 = 3,718.99/x
3. Step 3: Cross multiply
   3,815.02x = 5,687.78 × 3,718.99
4. Step 4: Simplify right side
   3,815.02x = 21,152,796.94
5. Step 5: Solve for x
   x = 21,152,796.94/3,815.02
6. Step 6: Final answer
   x = 5,544.61