Finding the Fourth Proportional to 2,773.90, 4,156.74 and 1,212.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,773.90 : 4,156.74 = 1,212.46 : x
2. Step 2: Convert to fraction form
   2,773.90/4,156.74 = 1,212.46/x
3. Step 3: Cross multiply
   2,773.90x = 4,156.74 × 1,212.46
4. Step 4: Simplify right side
   2,773.90x = 5,039,880.98
5. Step 5: Solve for x
   x = 5,039,880.98/2,773.90
6. Step 6: Final answer
   x = 1,816.89