Finding the Fourth Proportional to 2,213.78, 3,057.39 and 1,376.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,213.78 : 3,057.39 = 1,376.46 : x
2. Step 2: Convert to fraction form
   2,213.78/3,057.39 = 1,376.46/x
3. Step 3: Cross multiply
   2,213.78x = 3,057.39 × 1,376.46
4. Step 4: Simplify right side
   2,213.78x = 4,208,375.04
5. Step 5: Solve for x
   x = 4,208,375.04/2,213.78
6. Step 6: Final answer
   x = 1,900.99