Finding the Fourth Proportional to 3,815.03, 5,731.35 and 3,657.40

Step by Step Solution

1. Step 1: Write the proportion equation
   3,815.03 : 5,731.35 = 3,657.40 : x
2. Step 2: Convert to fraction form
   3,815.03/5,731.35 = 3,657.40/x
3. Step 3: Cross multiply
   3,815.03x = 5,731.35 × 3,657.40
4. Step 4: Simplify right side
   3,815.03x = 20,961,803.39
5. Step 5: Solve for x
   x = 20,961,803.39/3,815.03
6. Step 6: Final answer
   x = 5,494.53