Finding the Fourth Proportional to 1,371.05, 2,055.76 and 1,165.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,371.05 : 2,055.76 = 1,165.72 : x
2. Step 2: Convert to fraction form
   1,371.05/2,055.76 = 1,165.72/x
3. Step 3: Cross multiply
   1,371.05x = 2,055.76 × 1,165.72
4. Step 4: Simplify right side
   1,371.05x = 2,396,440.55
5. Step 5: Solve for x
   x = 2,396,440.55/1,371.05
6. Step 6: Final answer
   x = 1,747.89