Finding the Fourth Proportional to 32,805.72, 45,279.30 and 20,859.72

Step by Step Solution

1. Step 1: Write the proportion equation
   32,805.72 : 45,279.30 = 20,859.72 : x
2. Step 2: Convert to fraction form
   32,805.72/45,279.30 = 20,859.72/x
3. Step 3: Cross multiply
   32,805.72x = 45,279.30 × 20,859.72
4. Step 4: Simplify right side
   32,805.72x = 944,513,519.80
5. Step 5: Solve for x
   x = 944,513,519.80/32,805.72
6. Step 6: Final answer
   x = 28,791.12