Finding the Fourth Proportional to 10,906.30, 16,335.15 and 10,906.30

Step by Step Solution

1. Step 1: Write the proportion equation
   10,906.30 : 16,335.15 = 10,906.30 : x
2. Step 2: Convert to fraction form
   10,906.30/16,335.15 = 10,906.30/x
3. Step 3: Cross multiply
   10,906.30x = 16,335.15 × 10,906.30
4. Step 4: Simplify right side
   10,906.30x = 178,156,046.45
5. Step 5: Solve for x
   x = 178,156,046.45/10,906.30
6. Step 6: Final answer
   x = 16,335.15