Finding the Fourth Proportional to 10,692.16, 16,016.34 and 7,921.96

Step by Step Solution

1. Step 1: Write the proportion equation
   10,692.16 : 16,016.34 = 7,921.96 : x
2. Step 2: Convert to fraction form
   10,692.16/16,016.34 = 7,921.96/x
3. Step 3: Cross multiply
   10,692.16x = 16,016.34 × 7,921.96
4. Step 4: Simplify right side
   10,692.16x = 126,880,804.83
5. Step 5: Solve for x
   x = 126,880,804.83/10,692.16
6. Step 6: Final answer
   x = 11,866.71