Finding the Fourth Proportional to 2,172.18, 2,996.88 and 1,227.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,172.18 : 2,996.88 = 1,227.86 : x
2. Step 2: Convert to fraction form
   2,172.18/2,996.88 = 1,227.86/x
3. Step 3: Cross multiply
   2,172.18x = 2,996.88 × 1,227.86
4. Step 4: Simplify right side
   2,172.18x = 3,679,734.09
5. Step 5: Solve for x
   x = 3,679,734.09/2,172.18
6. Step 6: Final answer
   x = 1,694.03