Finding the Fourth Proportional to 21,659.72, 32,495.38 and 9,172.76

Step by Step Solution

1. Step 1: Write the proportion equation
   21,659.72 : 32,495.38 = 9,172.76 : x
2. Step 2: Convert to fraction form
   21,659.72/32,495.38 = 9,172.76/x
3. Step 3: Cross multiply
   21,659.72x = 32,495.38 × 9,172.76
4. Step 4: Simplify right side
   21,659.72x = 298,072,321.85
5. Step 5: Solve for x
   x = 298,072,321.85/21,659.72
6. Step 6: Final answer
   x = 13,761.60