Finding the Fourth Proportional to 2,272.05, 3,133.89 and 1,386.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,272.05 : 3,133.89 = 1,386.72 : x
2. Step 2: Convert to fraction form
   2,272.05/3,133.89 = 1,386.72/x
3. Step 3: Cross multiply
   2,272.05x = 3,133.89 × 1,386.72
4. Step 4: Simplify right side
   2,272.05x = 4,345,827.94
5. Step 5: Solve for x
   x = 4,345,827.94/2,272.05
6. Step 6: Final answer
   x = 1,912.73