Finding the Fourth Proportional to 21,017.76, 31,527.18 and 7,176.48

Step by Step Solution

1. Step 1: Write the proportion equation
   21,017.76 : 31,527.18 = 7,176.48 : x
2. Step 2: Convert to fraction form
   21,017.76/31,527.18 = 7,176.48/x
3. Step 3: Cross multiply
   21,017.76x = 31,527.18 × 7,176.48
4. Step 4: Simplify right side
   21,017.76x = 226,254,176.73
5. Step 5: Solve for x
   x = 226,254,176.73/21,017.76
6. Step 6: Final answer
   x = 10,764.90