Finding the Fourth Proportional to 2,172.24, 2,995.52 and 1,386

Step by Step Solution

1. Step 1: Write the proportion equation
   2,172.24 : 2,995.52 = 1,386 : x
2. Step 2: Convert to fraction form
   2,172.24/2,995.52 = 1,386/x
3. Step 3: Cross multiply
   2,172.24x = 2,995.52 × 1,386
4. Step 4: Simplify right side
   2,172.24x = 4,151,790.72
5. Step 5: Solve for x
   x = 4,151,790.72/2,172.24
6. Step 6: Final answer
   x = 1,911.29