Finding the Fourth Proportional to 10,213.76, 15,321.63 and 3,974.27

Step by Step Solution

1. Step 1: Write the proportion equation
   10,213.76 : 15,321.63 = 3,974.27 : x
2. Step 2: Convert to fraction form
   10,213.76/15,321.63 = 3,974.27/x
3. Step 3: Cross multiply
   10,213.76x = 15,321.63 × 3,974.27
4. Step 4: Simplify right side
   10,213.76x = 60,892,294.46
5. Step 5: Solve for x
   x = 60,892,294.46/10,213.76
6. Step 6: Final answer
   x = 5,961.79