Finding the Fourth Proportional to 2,167.55, 3,243.01 and 1,243.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,167.55 : 3,243.01 = 1,243.55 : x
2. Step 2: Convert to fraction form
   2,167.55/3,243.01 = 1,243.55/x
3. Step 3: Cross multiply
   2,167.55x = 3,243.01 × 1,243.55
4. Step 4: Simplify right side
   2,167.55x = 4,032,845.09
5. Step 5: Solve for x
   x = 4,032,845.09/2,167.55
6. Step 6: Final answer
   x = 1,860.55