Finding the Fourth Proportional to 21,290.24, 31,914.72 and 10,194.08

Step by Step Solution

1. Step 1: Write the proportion equation
   21,290.24 : 31,914.72 = 10,194.08 : x
2. Step 2: Convert to fraction form
   21,290.24/31,914.72 = 10,194.08/x
3. Step 3: Cross multiply
   21,290.24x = 31,914.72 × 10,194.08
4. Step 4: Simplify right side
   21,290.24x = 325,341,208.86
5. Step 5: Solve for x
   x = 325,341,208.86/21,290.24
6. Step 6: Final answer
   x = 15,281.24