Finding the Fourth Proportional to 2,275.82, 3,140.86 and 1,392.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,275.82 : 3,140.86 = 1,392.52 : x
2. Step 2: Convert to fraction form
   2,275.82/3,140.86 = 1,392.52/x
3. Step 3: Cross multiply
   2,275.82x = 3,140.86 × 1,392.52
4. Step 4: Simplify right side
   2,275.82x = 4,373,699.03
5. Step 5: Solve for x
   x = 4,373,699.03/2,275.82
6. Step 6: Final answer
   x = 1,921.81