Finding the Fourth Proportional to 21,693.72, 32,548.68 and 8,555.25

Step by Step Solution

1. Step 1: Write the proportion equation
   21,693.72 : 32,548.68 = 8,555.25 : x
2. Step 2: Convert to fraction form
   21,693.72/32,548.68 = 8,555.25/x
3. Step 3: Cross multiply
   21,693.72x = 32,548.68 × 8,555.25
4. Step 4: Simplify right side
   21,693.72x = 278,462,094.57
5. Step 5: Solve for x
   x = 278,462,094.57/21,693.72
6. Step 6: Final answer
   x = 12,836.07