Finding the Fourth Proportional to 2,136.56, 2,947.56 and 1,438.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,136.56 : 2,947.56 = 1,438.16 : x
2. Step 2: Convert to fraction form
   2,136.56/2,947.56 = 1,438.16/x
3. Step 3: Cross multiply
   2,136.56x = 2,947.56 × 1,438.16
4. Step 4: Simplify right side
   2,136.56x = 4,239,062.89
5. Step 5: Solve for x
   x = 4,239,062.89/2,136.56
6. Step 6: Final answer
   x = 1,984.06