Finding the Fourth Proportional to 16,774.72, 23,141.80 and 10,399.64

Step by Step Solution

1. Step 1: Write the proportion equation
   16,774.72 : 23,141.80 = 10,399.64 : x
2. Step 2: Convert to fraction form
   16,774.72/23,141.80 = 10,399.64/x
3. Step 3: Cross multiply
   16,774.72x = 23,141.80 × 10,399.64
4. Step 4: Simplify right side
   16,774.72x = 240,666,388.95
5. Step 5: Solve for x
   x = 240,666,388.95/16,774.72
6. Step 6: Final answer
   x = 14,346.97