Finding the Fourth Proportional to 21,269.60, 31,892.72 and 10,179.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,269.60 : 31,892.72 = 10,179.12 : x
2. Step 2: Convert to fraction form
   21,269.60/31,892.72 = 10,179.12/x
3. Step 3: Cross multiply
   21,269.60x = 31,892.72 × 10,179.12
4. Step 4: Simplify right side
   21,269.60x = 324,639,824.01
5. Step 5: Solve for x
   x = 324,639,824.01/21,269.60
6. Step 6: Final answer
   x = 15,263.09