Finding the Fourth Proportional to 19,997.48, 27,540.38 and 19,561.48

Step by Step Solution

1. Step 1: Write the proportion equation
   19,997.48 : 27,540.38 = 19,561.48 : x
2. Step 2: Convert to fraction form
   19,997.48/27,540.38 = 19,561.48/x
3. Step 3: Cross multiply
   19,997.48x = 27,540.38 × 19,561.48
4. Step 4: Simplify right side
   19,997.48x = 538,730,592.56
5. Step 5: Solve for x
   x = 538,730,592.56/19,997.48
6. Step 6: Final answer
   x = 26,939.92