Finding the Fourth Proportional to 19,870.97, 27,414.06 and 12,801.50

Step by Step Solution

1. Step 1: Write the proportion equation
   19,870.97 : 27,414.06 = 12,801.50 : x
2. Step 2: Convert to fraction form
   19,870.97/27,414.06 = 12,801.50/x
3. Step 3: Cross multiply
   19,870.97x = 27,414.06 × 12,801.50
4. Step 4: Simplify right side
   19,870.97x = 350,941,089.09
5. Step 5: Solve for x
   x = 350,941,089.09/19,870.97
6. Step 6: Final answer
   x = 17,660.99