Finding the Fourth Proportional to 9,719.69, 14,581.85 and 3,145.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,719.69 : 14,581.85 = 3,145.88 : x
2. Step 2: Convert to fraction form
   9,719.69/14,581.85 = 3,145.88/x
3. Step 3: Cross multiply
   9,719.69x = 14,581.85 × 3,145.88
4. Step 4: Simplify right side
   9,719.69x = 45,872,721.69
5. Step 5: Solve for x
   x = 45,872,721.69/9,719.69
6. Step 6: Final answer
   x = 4,719.57