Finding the Fourth Proportional to 2,127.31, 2,936.05 and 1,243.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,127.31 : 2,936.05 = 1,243.40 : x
2. Step 2: Convert to fraction form
   2,127.31/2,936.05 = 1,243.40/x
3. Step 3: Cross multiply
   2,127.31x = 2,936.05 × 1,243.40
4. Step 4: Simplify right side
   2,127.31x = 3,650,683.30
5. Step 5: Solve for x
   x = 3,650,683.30/2,127.31
6. Step 6: Final answer
   x = 1,716.10