Finding the Fourth Proportional to 21,636.95, 32,483.43 and 20,748.47

Step by Step Solution

1. Step 1: Write the proportion equation
   21,636.95 : 32,483.43 = 20,748.47 : x
2. Step 2: Convert to fraction form
   21,636.95/32,483.43 = 20,748.47/x
3. Step 3: Cross multiply
   21,636.95x = 32,483.43 × 20,748.47
4. Step 4: Simplify right side
   21,636.95x = 673,981,310.43
5. Step 5: Solve for x
   x = 673,981,310.43/21,636.95
6. Step 6: Final answer
   x = 31,149.56