Finding the Fourth Proportional to 2,111.76, 2,914.25 and 1,227.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.76 : 2,914.25 = 1,227.78 : x
2. Step 2: Convert to fraction form
   2,111.76/2,914.25 = 1,227.78/x
3. Step 3: Cross multiply
   2,111.76x = 2,914.25 × 1,227.78
4. Step 4: Simplify right side
   2,111.76x = 3,578,051.73
5. Step 5: Solve for x
   x = 3,578,051.73/2,111.76
6. Step 6: Final answer
   x = 1,694.35