Finding the Fourth Proportional to 21,441.86, 32,212.23 and 20,556.14

Step by Step Solution

1. Step 1: Write the proportion equation
   21,441.86 : 32,212.23 = 20,556.14 : x
2. Step 2: Convert to fraction form
   21,441.86/32,212.23 = 20,556.14/x
3. Step 3: Cross multiply
   21,441.86x = 32,212.23 × 20,556.14
4. Step 4: Simplify right side
   21,441.86x = 662,159,109.59
5. Step 5: Solve for x
   x = 662,159,109.59/21,441.86
6. Step 6: Final answer
   x = 30,881.61