Finding the Fourth Proportional to 19,620.69, 27,061.83 and 13,875.75

Step by Step Solution

1. Step 1: Write the proportion equation
   19,620.69 : 27,061.83 = 13,875.75 : x
2. Step 2: Convert to fraction form
   19,620.69/27,061.83 = 13,875.75/x
3. Step 3: Cross multiply
   19,620.69x = 27,061.83 × 13,875.75
4. Step 4: Simplify right side
   19,620.69x = 375,503,187.62
5. Step 5: Solve for x
   x = 375,503,187.62/19,620.69
6. Step 6: Final answer
   x = 19,138.12