Finding the Fourth Proportional to 21,066.76, 31,601.58 and 7,225.48

Step by Step Solution

1. Step 1: Write the proportion equation
   21,066.76 : 31,601.58 = 7,225.48 : x
2. Step 2: Convert to fraction form
   21,066.76/31,601.58 = 7,225.48/x
3. Step 3: Cross multiply
   21,066.76x = 31,601.58 × 7,225.48
4. Step 4: Simplify right side
   21,066.76x = 228,336,584.26
5. Step 5: Solve for x
   x = 228,336,584.26/21,066.76
6. Step 6: Final answer
   x = 10,838.71