Finding the Fourth Proportional to 2,276.72, 3,141.20 and 1,392.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,276.72 : 3,141.20 = 1,392.32 : x
2. Step 2: Convert to fraction form
   2,276.72/3,141.20 = 1,392.32/x
3. Step 3: Cross multiply
   2,276.72x = 3,141.20 × 1,392.32
4. Step 4: Simplify right side
   2,276.72x = 4,373,555.58
5. Step 5: Solve for x
   x = 4,373,555.58/2,276.72
6. Step 6: Final answer
   x = 1,920.99