Finding the Fourth Proportional to 16,646.07, 22,961.56 and 10,978.81

Step by Step Solution

1. Step 1: Write the proportion equation
   16,646.07 : 22,961.56 = 10,978.81 : x
2. Step 2: Convert to fraction form
   16,646.07/22,961.56 = 10,978.81/x
3. Step 3: Cross multiply
   16,646.07x = 22,961.56 × 10,978.81
4. Step 4: Simplify right side
   16,646.07x = 252,090,519.69
5. Step 5: Solve for x
   x = 252,090,519.69/16,646.07
6. Step 6: Final answer
   x = 15,144.15