Finding the Fourth Proportional to 10,866.56, 16,170.03 and 10,829.70

Step by Step Solution

1. Step 1: Write the proportion equation
   10,866.56 : 16,170.03 = 10,829.70 : x
2. Step 2: Convert to fraction form
   10,866.56/16,170.03 = 10,829.70/x
3. Step 3: Cross multiply
   10,866.56x = 16,170.03 × 10,829.70
4. Step 4: Simplify right side
   10,866.56x = 175,116,573.89
5. Step 5: Solve for x
   x = 175,116,573.89/10,866.56
6. Step 6: Final answer
   x = 16,115.19