Finding the Fourth Proportional to 2,774.77, 4,159.78 and 1,213.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,774.77 : 4,159.78 = 1,213.61 : x
2. Step 2: Convert to fraction form
   2,774.77/4,159.78 = 1,213.61/x
3. Step 3: Cross multiply
   2,774.77x = 4,159.78 × 1,213.61
4. Step 4: Simplify right side
   2,774.77x = 5,048,326.77
5. Step 5: Solve for x
   x = 5,048,326.77/2,774.77
6. Step 6: Final answer
   x = 1,819.37