Finding the Fourth Proportional to 3,165.72, 4,748.55 and 1,216.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,165.72 : 4,748.55 = 1,216.56 : x
2. Step 2: Convert to fraction form
   3,165.72/4,748.55 = 1,216.56/x
3. Step 3: Cross multiply
   3,165.72x = 4,748.55 × 1,216.56
4. Step 4: Simplify right side
   3,165.72x = 5,776,895.99
5. Step 5: Solve for x
   x = 5,776,895.99/3,165.72
6. Step 6: Final answer
   x = 1,824.83