Finding the Fourth Proportional to 9,719.06, 14,578.79 and 3,145.23

Step by Step Solution

1. Step 1: Write the proportion equation
   9,719.06 : 14,578.79 = 3,145.23 : x
2. Step 2: Convert to fraction form
   9,719.06/14,578.79 = 3,145.23/x
3. Step 3: Cross multiply
   9,719.06x = 14,578.79 × 3,145.23
4. Step 4: Simplify right side
   9,719.06x = 45,853,631.95
5. Step 5: Solve for x
   x = 45,853,631.95/9,719.06
6. Step 6: Final answer
   x = 4,717.91