Finding the Fourth Proportional to 3,456.73, 5,178.61 and 2,521.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,456.73 : 5,178.61 = 2,521.72 : x
2. Step 2: Convert to fraction form
   3,456.73/5,178.61 = 2,521.72/x
3. Step 3: Cross multiply
   3,456.73x = 5,178.61 × 2,521.72
4. Step 4: Simplify right side
   3,456.73x = 13,059,004.41
5. Step 5: Solve for x
   x = 13,059,004.41/3,456.73
6. Step 6: Final answer
   x = 3,777.85