Finding the Fourth Proportional to 25,499.60, 38,236.20 and 7,964.72

Step by Step Solution

1. Step 1: Write the proportion equation
   25,499.60 : 38,236.20 = 7,964.72 : x
2. Step 2: Convert to fraction form
   25,499.60/38,236.20 = 7,964.72/x
3. Step 3: Cross multiply
   25,499.60x = 38,236.20 × 7,964.72
4. Step 4: Simplify right side
   25,499.60x = 304,540,626.86
5. Step 5: Solve for x
   x = 304,540,626.86/25,499.60
6. Step 6: Final answer
   x = 11,942.96