Finding the Fourth Proportional to 21,682.72, 32,504.64 and 7,828.48

Step by Step Solution

1. Step 1: Write the proportion equation
   21,682.72 : 32,504.64 = 7,828.48 : x
2. Step 2: Convert to fraction form
   21,682.72/32,504.64 = 7,828.48/x
3. Step 3: Cross multiply
   21,682.72x = 32,504.64 × 7,828.48
4. Step 4: Simplify right side
   21,682.72x = 254,461,924.15
5. Step 5: Solve for x
   x = 254,461,924.15/21,682.72
6. Step 6: Final answer
   x = 11,735.70