Finding the Fourth Proportional to 10,828.22, 14,929.52 and 8,947.40

Step by Step Solution

1. Step 1: Write the proportion equation
   10,828.22 : 14,929.52 = 8,947.40 : x
2. Step 2: Convert to fraction form
   10,828.22/14,929.52 = 8,947.40/x
3. Step 3: Cross multiply
   10,828.22x = 14,929.52 × 8,947.40
4. Step 4: Simplify right side
   10,828.22x = 133,580,387.25
5. Step 5: Solve for x
   x = 133,580,387.25/10,828.22
6. Step 6: Final answer
   x = 12,336.32