Finding the Fourth Proportional to 20,667.96, 28,528.20 and 19,610.01

Step by Step Solution

1. Step 1: Write the proportion equation
   20,667.96 : 28,528.20 = 19,610.01 : x
2. Step 2: Convert to fraction form
   20,667.96/28,528.20 = 19,610.01/x
3. Step 3: Cross multiply
   20,667.96x = 28,528.20 × 19,610.01
4. Step 4: Simplify right side
   20,667.96x = 559,438,287.28
5. Step 5: Solve for x
   x = 559,438,287.28/20,667.96
6. Step 6: Final answer
   x = 27,067.90