Finding the Fourth Proportional to 10,863, 16,300.62 and 10,780.38

Step by Step Solution

1. Step 1: Write the proportion equation
   10,863 : 16,300.62 = 10,780.38 : x
2. Step 2: Convert to fraction form
   10,863/16,300.62 = 10,780.38/x
3. Step 3: Cross multiply
   10,863x = 16,300.62 × 10,780.38
4. Step 4: Simplify right side
   10,863x = 175,726,877.84
5. Step 5: Solve for x
   x = 175,726,877.84/10,863
6. Step 6: Final answer
   x = 16,176.64