Finding the Fourth Proportional to 10,811.82, 16,168.32 and 7,860.18

Step by Step Solution

1. Step 1: Write the proportion equation
   10,811.82 : 16,168.32 = 7,860.18 : x
2. Step 2: Convert to fraction form
   10,811.82/16,168.32 = 7,860.18/x
3. Step 3: Cross multiply
   10,811.82x = 16,168.32 × 7,860.18
4. Step 4: Simplify right side
   10,811.82x = 127,085,905.50
5. Step 5: Solve for x
   x = 127,085,905.50/10,811.82
6. Step 6: Final answer
   x = 11,754.35