Finding the Fourth Proportional to 21,945.34, 32,921.52 and 7,153.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,945.34 : 32,921.52 = 7,153.12 : x
2. Step 2: Convert to fraction form
   21,945.34/32,921.52 = 7,153.12/x
3. Step 3: Cross multiply
   21,945.34x = 32,921.52 × 7,153.12
4. Step 4: Simplify right side
   21,945.34x = 235,491,583.14
5. Step 5: Solve for x
   x = 235,491,583.14/21,945.34
6. Step 6: Final answer
   x = 10,730.82