Finding the Fourth Proportional to 2,810.12, 4,212.30 and 1,419.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,810.12 : 4,212.30 = 1,419.20 : x
2. Step 2: Convert to fraction form
   2,810.12/4,212.30 = 1,419.20/x
3. Step 3: Cross multiply
   2,810.12x = 4,212.30 × 1,419.20
4. Step 4: Simplify right side
   2,810.12x = 5,978,096.16
5. Step 5: Solve for x
   x = 5,978,096.16/2,810.12
6. Step 6: Final answer
   x = 2,127.35