Finding the Fourth Proportional to 16,777.31, 25,164.34 and 8,454.02

Step by Step Solution

1. Step 1: Write the proportion equation
   16,777.31 : 25,164.34 = 8,454.02 : x
2. Step 2: Convert to fraction form
   16,777.31/25,164.34 = 8,454.02/x
3. Step 3: Cross multiply
   16,777.31x = 25,164.34 × 8,454.02
4. Step 4: Simplify right side
   16,777.31x = 212,739,686.69
5. Step 5: Solve for x
   x = 212,739,686.69/16,777.31
6. Step 6: Final answer
   x = 12,680.21