Finding the Fourth Proportional to 21,505.53, 32,243.57 and 10,955.15

Step by Step Solution

1. Step 1: Write the proportion equation
   21,505.53 : 32,243.57 = 10,955.15 : x
2. Step 2: Convert to fraction form
   21,505.53/32,243.57 = 10,955.15/x
3. Step 3: Cross multiply
   21,505.53x = 32,243.57 × 10,955.15
4. Step 4: Simplify right side
   21,505.53x = 353,233,091.89
5. Step 5: Solve for x
   x = 353,233,091.89/21,505.53
6. Step 6: Final answer
   x = 16,425.22