Finding the Fourth Proportional to 21,570.53, 32,127.90 and 20,610.77

Step by Step Solution

1. Step 1: Write the proportion equation
   21,570.53 : 32,127.90 = 20,610.77 : x
2. Step 2: Convert to fraction form
   21,570.53/32,127.90 = 20,610.77/x
3. Step 3: Cross multiply
   21,570.53x = 32,127.90 × 20,610.77
4. Step 4: Simplify right side
   21,570.53x = 662,180,519.55
5. Step 5: Solve for x
   x = 662,180,519.55/21,570.53
6. Step 6: Final answer
   x = 30,698.40