Finding the Fourth Proportional to 21,910.56, 32,824.16 and 13,007.04

Step by Step Solution

1. Step 1: Write the proportion equation
   21,910.56 : 32,824.16 = 13,007.04 : x
2. Step 2: Convert to fraction form
   21,910.56/32,824.16 = 13,007.04/x
3. Step 3: Cross multiply
   21,910.56x = 32,824.16 × 13,007.04
4. Step 4: Simplify right side
   21,910.56x = 426,945,162.09
5. Step 5: Solve for x
   x = 426,945,162.09/21,910.56
6. Step 6: Final answer
   x = 19,485.82