Finding the Fourth Proportional to 10,209.74, 15,307.40 and 3,964.56

Step by Step Solution

1. Step 1: Write the proportion equation
   10,209.74 : 15,307.40 = 3,964.56 : x
2. Step 2: Convert to fraction form
   10,209.74/15,307.40 = 3,964.56/x
3. Step 3: Cross multiply
   10,209.74x = 15,307.40 × 3,964.56
4. Step 4: Simplify right side
   10,209.74x = 60,687,105.74
5. Step 5: Solve for x
   x = 60,687,105.74/10,209.74
6. Step 6: Final answer
   x = 5,944.04