Finding the Fourth Proportional to 2,287.78, 3,156.87 and 1,343.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,287.78 : 3,156.87 = 1,343.59 : x
2. Step 2: Convert to fraction form
   2,287.78/3,156.87 = 1,343.59/x
3. Step 3: Cross multiply
   2,287.78x = 3,156.87 × 1,343.59
4. Step 4: Simplify right side
   2,287.78x = 4,241,538.96
5. Step 5: Solve for x
   x = 4,241,538.96/2,287.78
6. Step 6: Final answer
   x = 1,854.00