Finding the Fourth Proportional to 21,097.76, 31,621.32 and 9,837.92

Step by Step Solution

1. Step 1: Write the proportion equation
   21,097.76 : 31,621.32 = 9,837.92 : x
2. Step 2: Convert to fraction form
   21,097.76/31,621.32 = 9,837.92/x
3. Step 3: Cross multiply
   21,097.76x = 31,621.32 × 9,837.92
4. Step 4: Simplify right side
   21,097.76x = 311,088,016.45
5. Step 5: Solve for x
   x = 311,088,016.45/21,097.76
6. Step 6: Final answer
   x = 14,745.07