Finding the Fourth Proportional to 21,820.86, 32,728.20 and 7,028.04

Step by Step Solution

1. Step 1: Write the proportion equation
   21,820.86 : 32,728.20 = 7,028.04 : x
2. Step 2: Convert to fraction form
   21,820.86/32,728.20 = 7,028.04/x
3. Step 3: Cross multiply
   21,820.86x = 32,728.20 × 7,028.04
4. Step 4: Simplify right side
   21,820.86x = 230,015,098.73
5. Step 5: Solve for x
   x = 230,015,098.73/21,820.86
6. Step 6: Final answer
   x = 10,541.06