Finding the Fourth Proportional to 2,148.56, 3,222.23 and 977.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,148.56 : 3,222.23 = 977.91 : x
2. Step 2: Convert to fraction form
   2,148.56/3,222.23 = 977.91/x
3. Step 3: Cross multiply
   2,148.56x = 3,222.23 × 977.91
4. Step 4: Simplify right side
   2,148.56x = 3,151,046.05
5. Step 5: Solve for x
   x = 3,151,046.05/2,148.56
6. Step 6: Final answer
   x = 1,466.58