Finding the Fourth Proportional to 21,064.52, 31,606.54 and 9,216.73

Step by Step Solution

1. Step 1: Write the proportion equation
   21,064.52 : 31,606.54 = 9,216.73 : x
2. Step 2: Convert to fraction form
   21,064.52/31,606.54 = 9,216.73/x
3. Step 3: Cross multiply
   21,064.52x = 31,606.54 × 9,216.73
4. Step 4: Simplify right side
   21,064.52x = 291,308,764.34
5. Step 5: Solve for x
   x = 291,308,764.34/21,064.52
6. Step 6: Final answer
   x = 13,829.36