Finding the Fourth Proportional to 12,181.32, 16,811.87 and 7,146.77

Step by Step Solution

1. Step 1: Write the proportion equation
   12,181.32 : 16,811.87 = 7,146.77 : x
2. Step 2: Convert to fraction form
   12,181.32/16,811.87 = 7,146.77/x
3. Step 3: Cross multiply
   12,181.32x = 16,811.87 × 7,146.77
4. Step 4: Simplify right side
   12,181.32x = 120,150,448.37
5. Step 5: Solve for x
   x = 120,150,448.37/12,181.32
6. Step 6: Final answer
   x = 9,863.50