Finding the Fourth Proportional to 22,404.94, 30,911.40 and 12,966.82

Step by Step Solution

1. Step 1: Write the proportion equation
   22,404.94 : 30,911.40 = 12,966.82 : x
2. Step 2: Convert to fraction form
   22,404.94/30,911.40 = 12,966.82/x
3. Step 3: Cross multiply
   22,404.94x = 30,911.40 × 12,966.82
4. Step 4: Simplify right side
   22,404.94x = 400,822,559.75
5. Step 5: Solve for x
   x = 400,822,559.75/22,404.94
6. Step 6: Final answer
   x = 17,889.92