Finding the Fourth Proportional to 19,693.28, 27,168.72 and 12,623.84

Step by Step Solution

1. Step 1: Write the proportion equation
   19,693.28 : 27,168.72 = 12,623.84 : x
2. Step 2: Convert to fraction form
   19,693.28/27,168.72 = 12,623.84/x
3. Step 3: Cross multiply
   19,693.28x = 27,168.72 × 12,623.84
4. Step 4: Simplify right side
   19,693.28x = 342,973,574.28
5. Step 5: Solve for x
   x = 342,973,574.28/19,693.28
6. Step 6: Final answer
   x = 17,415.77