Finding the Fourth Proportional to 10,836.80, 16,258.52 and 9,719.15

Step by Step Solution

1. Step 1: Write the proportion equation
   10,836.80 : 16,258.52 = 9,719.15 : x
2. Step 2: Convert to fraction form
   10,836.80/16,258.52 = 9,719.15/x
3. Step 3: Cross multiply
   10,836.80x = 16,258.52 × 9,719.15
4. Step 4: Simplify right side
   10,836.80x = 158,018,974.45
5. Step 5: Solve for x
   x = 158,018,974.45/10,836.80
6. Step 6: Final answer
   x = 14,581.70