Finding the Fourth Proportional to 16,826.71, 23,221.47 and 10,456.81

Step by Step Solution

1. Step 1: Write the proportion equation
   16,826.71 : 23,221.47 = 10,456.81 : x
2. Step 2: Convert to fraction form
   16,826.71/23,221.47 = 10,456.81/x
3. Step 3: Cross multiply
   16,826.71x = 23,221.47 × 10,456.81
4. Step 4: Simplify right side
   16,826.71x = 242,822,499.71
5. Step 5: Solve for x
   x = 242,822,499.71/16,826.71
6. Step 6: Final answer
   x = 14,430.78