Finding the Fourth Proportional to 21,196.92, 31,787.28 and 10,095.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,196.92 : 31,787.28 = 10,095.12 : x
2. Step 2: Convert to fraction form
   21,196.92/31,787.28 = 10,095.12/x
3. Step 3: Cross multiply
   21,196.92x = 31,787.28 × 10,095.12
4. Step 4: Simplify right side
   21,196.92x = 320,896,406.07
5. Step 5: Solve for x
   x = 320,896,406.07/21,196.92
6. Step 6: Final answer
   x = 15,138.82