Finding the Fourth Proportional to 2,172.06, 2,997.39 and 1,240.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,172.06 : 2,997.39 = 1,240.50 : x
2. Step 2: Convert to fraction form
   2,172.06/2,997.39 = 1,240.50/x
3. Step 3: Cross multiply
   2,172.06x = 2,997.39 × 1,240.50
4. Step 4: Simplify right side
   2,172.06x = 3,718,262.30
5. Step 5: Solve for x
   x = 3,718,262.30/2,172.06
6. Step 6: Final answer
   x = 1,711.86