Finding the Fourth Proportional to 20,723.86, 28,548.88 and 17,123.82

Step by Step Solution

1. Step 1: Write the proportion equation
   20,723.86 : 28,548.88 = 17,123.82 : x
2. Step 2: Convert to fraction form
   20,723.86/28,548.88 = 17,123.82/x
3. Step 3: Cross multiply
   20,723.86x = 28,548.88 × 17,123.82
4. Step 4: Simplify right side
   20,723.86x = 488,865,882.32
5. Step 5: Solve for x
   x = 488,865,882.32/20,723.86
6. Step 6: Final answer
   x = 23,589.52