Finding the Fourth Proportional to 2,287.21, 3,156.42 and 1,292.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,287.21 : 3,156.42 = 1,292.53 : x
2. Step 2: Convert to fraction form
   2,287.21/3,156.42 = 1,292.53/x
3. Step 3: Cross multiply
   2,287.21x = 3,156.42 × 1,292.53
4. Step 4: Simplify right side
   2,287.21x = 4,079,767.54
5. Step 5: Solve for x
   x = 4,079,767.54/2,287.21
6. Step 6: Final answer
   x = 1,783.73