Finding the Fourth Proportional to 12,145.11, 16,767.50 and 8,784.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,145.11 : 16,767.50 = 8,784.42 : x
2. Step 2: Convert to fraction form
   12,145.11/16,767.50 = 8,784.42/x
3. Step 3: Cross multiply
   12,145.11x = 16,767.50 × 8,784.42
4. Step 4: Simplify right side
   12,145.11x = 147,292,718.43
5. Step 5: Solve for x
   x = 147,292,718.43/12,145.11
6. Step 6: Final answer
   x = 12,127.74