Finding the Fourth Proportional to 19,801.40, 27,315.56 and 12,245.31

Step by Step Solution

1. Step 1: Write the proportion equation
   19,801.40 : 27,315.56 = 12,245.31 : x
2. Step 2: Convert to fraction form
   19,801.40/27,315.56 = 12,245.31/x
3. Step 3: Cross multiply
   19,801.40x = 27,315.56 × 12,245.31
4. Step 4: Simplify right side
   19,801.40x = 334,487,530.64
5. Step 5: Solve for x
   x = 334,487,530.64/19,801.40
6. Step 6: Final answer
   x = 16,892.12