Finding the Fourth Proportional to 21,749.72, 32,605.02 and 7,889

Step by Step Solution

1. Step 1: Write the proportion equation
   21,749.72 : 32,605.02 = 7,889 : x
2. Step 2: Convert to fraction form
   21,749.72/32,605.02 = 7,889/x
3. Step 3: Cross multiply
   21,749.72x = 32,605.02 × 7,889
4. Step 4: Simplify right side
   21,749.72x = 257,221,002.78
5. Step 5: Solve for x
   x = 257,221,002.78/21,749.72
6. Step 6: Final answer
   x = 11,826.41