Finding the Fourth Proportional to 2,076.74, 3,115.59 and 1,211.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,076.74 : 3,115.59 = 1,211.78 : x
2. Step 2: Convert to fraction form
   2,076.74/3,115.59 = 1,211.78/x
3. Step 3: Cross multiply
   2,076.74x = 3,115.59 × 1,211.78
4. Step 4: Simplify right side
   2,076.74x = 3,775,409.65
5. Step 5: Solve for x
   x = 3,775,409.65/2,076.74
6. Step 6: Final answer
   x = 1,817.95