Finding the Fourth Proportional to 2,276.70, 3,141.89 and 1,380.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,276.70 : 3,141.89 = 1,380.43 : x
2. Step 2: Convert to fraction form
   2,276.70/3,141.89 = 1,380.43/x
3. Step 3: Cross multiply
   2,276.70x = 3,141.89 × 1,380.43
4. Step 4: Simplify right side
   2,276.70x = 4,337,159.21
5. Step 5: Solve for x
   x = 4,337,159.21/2,276.70
6. Step 6: Final answer
   x = 1,905.02