Finding the Fourth Proportional to 12,086.50, 16,679.42 and 7,054.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,086.50 : 16,679.42 = 7,054.20 : x
2. Step 2: Convert to fraction form
   12,086.50/16,679.42 = 7,054.20/x
3. Step 3: Cross multiply
   12,086.50x = 16,679.42 × 7,054.20
4. Step 4: Simplify right side
   12,086.50x = 117,659,964.56
5. Step 5: Solve for x
   x = 117,659,964.56/12,086.50
6. Step 6: Final answer
   x = 9,734.83