Finding the Fourth Proportional to 2,777.82, 4,167.90 and 1,217.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,777.82 : 4,167.90 = 1,217.02 : x
2. Step 2: Convert to fraction form
   2,777.82/4,167.90 = 1,217.02/x
3. Step 3: Cross multiply
   2,777.82x = 4,167.90 × 1,217.02
4. Step 4: Simplify right side
   2,777.82x = 5,072,411.57
5. Step 5: Solve for x
   x = 5,072,411.57/2,777.82
6. Step 6: Final answer
   x = 1,826.04