Finding the Fourth Proportional to 5,902.78, 8,145.86 and 3,385.04

Step by Step Solution

1. Step 1: Write the proportion equation
   5,902.78 : 8,145.86 = 3,385.04 : x
2. Step 2: Convert to fraction form
   5,902.78/8,145.86 = 3,385.04/x
3. Step 3: Cross multiply
   5,902.78x = 8,145.86 × 3,385.04
4. Step 4: Simplify right side
   5,902.78x = 27,574,061.93
5. Step 5: Solve for x
   x = 27,574,061.93/5,902.78
6. Step 6: Final answer
   x = 4,671.37