Finding the Fourth Proportional to 1,371.34, 2,056.89 and 1,138.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,371.34 : 2,056.89 = 1,138.06 : x
2. Step 2: Convert to fraction form
   1,371.34/2,056.89 = 1,138.06/x
3. Step 3: Cross multiply
   1,371.34x = 2,056.89 × 1,138.06
4. Step 4: Simplify right side
   1,371.34x = 2,340,864.23
5. Step 5: Solve for x
   x = 2,340,864.23/1,371.34
6. Step 6: Final answer
   x = 1,706.99