Finding the Fourth Proportional to 2,912.72, 4,362.52 and 1,677.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,912.72 : 4,362.52 = 1,677.20 : x
2. Step 2: Convert to fraction form
   2,912.72/4,362.52 = 1,677.20/x
3. Step 3: Cross multiply
   2,912.72x = 4,362.52 × 1,677.20
4. Step 4: Simplify right side
   2,912.72x = 7,316,818.54
5. Step 5: Solve for x
   x = 7,316,818.54/2,912.72
6. Step 6: Final answer
   x = 2,512.02