Finding the Fourth Proportional to 3,404.10, 4,697.31 and 1,911.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,404.10 : 4,697.31 = 1,911.78 : x
2. Step 2: Convert to fraction form
   3,404.10/4,697.31 = 1,911.78/x
3. Step 3: Cross multiply
   3,404.10x = 4,697.31 × 1,911.78
4. Step 4: Simplify right side
   3,404.10x = 8,980,223.31
5. Step 5: Solve for x
   x = 8,980,223.31/3,404.10
6. Step 6: Final answer
   x = 2,638.06