Finding the Fourth Proportional to 2,215.90, 3,057.91 and 1,376.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.90 : 3,057.91 = 1,376.56 : x
2. Step 2: Convert to fraction form
   2,215.90/3,057.91 = 1,376.56/x
3. Step 3: Cross multiply
   2,215.90x = 3,057.91 × 1,376.56
4. Step 4: Simplify right side
   2,215.90x = 4,209,396.59
5. Step 5: Solve for x
   x = 4,209,396.59/2,215.90
6. Step 6: Final answer
   x = 1,899.63