Finding the Fourth Proportional to 3,902.78, 5,868.23 and 3,598.35

Step by Step Solution

1. Step 1: Write the proportion equation
   3,902.78 : 5,868.23 = 3,598.35 : x
2. Step 2: Convert to fraction form
   3,902.78/5,868.23 = 3,598.35/x
3. Step 3: Cross multiply
   3,902.78x = 5,868.23 × 3,598.35
4. Step 4: Simplify right side
   3,902.78x = 21,115,927.43
5. Step 5: Solve for x
   x = 21,115,927.43/3,902.78
6. Step 6: Final answer
   x = 5,410.49