Finding the Fourth Proportional to 3,404.21, 4,697.96 and 1,912.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,404.21 : 4,697.96 = 1,912.10 : x
2. Step 2: Convert to fraction form
   3,404.21/4,697.96 = 1,912.10/x
3. Step 3: Cross multiply
   3,404.21x = 4,697.96 × 1,912.10
4. Step 4: Simplify right side
   3,404.21x = 8,982,971.50
5. Step 5: Solve for x
   x = 8,982,971.50/3,404.21
6. Step 6: Final answer
   x = 2,638.78