Finding the Fourth Proportional to 1,291.31, 1,936.89 and 743.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,291.31 : 1,936.89 = 743.09 : x
2. Step 2: Convert to fraction form
   1,291.31/1,936.89 = 743.09/x
3. Step 3: Cross multiply
   1,291.31x = 1,936.89 × 743.09
4. Step 4: Simplify right side
   1,291.31x = 1,439,283.59
5. Step 5: Solve for x
   x = 1,439,283.59/1,291.31
6. Step 6: Final answer
   x = 1,114.59