Finding the Fourth Proportional to 12,076.07, 18,118.20 and 10,911.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,076.07 : 18,118.20 = 10,911.50 : x
2. Step 2: Convert to fraction form
   12,076.07/18,118.20 = 10,911.50/x
3. Step 3: Cross multiply
   12,076.07x = 18,118.20 × 10,911.50
4. Step 4: Simplify right side
   12,076.07x = 197,696,648.71
5. Step 5: Solve for x
   x = 197,696,648.71/12,076.07
6. Step 6: Final answer
   x = 16,370.95