Finding the Fourth Proportional to 20,156.86, 27,806.79 and 17,357.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,156.86 : 27,806.79 = 17,357.50 : x
2. Step 2: Convert to fraction form
   20,156.86/27,806.79 = 17,357.50/x
3. Step 3: Cross multiply
   20,156.86x = 27,806.79 × 17,357.50
4. Step 4: Simplify right side
   20,156.86x = 482,656,357.43
5. Step 5: Solve for x
   x = 482,656,357.43/20,156.86
6. Step 6: Final answer
   x = 23,945.02