Finding the Fourth Proportional to 2,136.31, 2,947.29 and 1,338.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,136.31 : 2,947.29 = 1,338.25 : x
2. Step 2: Convert to fraction form
   2,136.31/2,947.29 = 1,338.25/x
3. Step 3: Cross multiply
   2,136.31x = 2,947.29 × 1,338.25
4. Step 4: Simplify right side
   2,136.31x = 3,944,208.41
5. Step 5: Solve for x
   x = 3,944,208.41/2,136.31
6. Step 6: Final answer
   x = 1,846.27