Finding the Fourth Proportional to 19,769.67, 27,288.50 and 13,061.25

Step by Step Solution

1. Step 1: Write the proportion equation
   19,769.67 : 27,288.50 = 13,061.25 : x
2. Step 2: Convert to fraction form
   19,769.67/27,288.50 = 13,061.25/x
3. Step 3: Cross multiply
   19,769.67x = 27,288.50 × 13,061.25
4. Step 4: Simplify right side
   19,769.67x = 356,421,855.32
5. Step 5: Solve for x
   x = 356,421,855.32/19,769.67
6. Step 6: Final answer
   x = 18,028.72