Finding the Fourth Proportional to 10,915.72, 16,374.79 and 3,897.37

Step by Step Solution

1. Step 1: Write the proportion equation
   10,915.72 : 16,374.79 = 3,897.37 : x
2. Step 2: Convert to fraction form
   10,915.72/16,374.79 = 3,897.37/x
3. Step 3: Cross multiply
   10,915.72x = 16,374.79 × 3,897.37
4. Step 4: Simplify right side
   10,915.72x = 63,818,615.30
5. Step 5: Solve for x
   x = 63,818,615.30/10,915.72
6. Step 6: Final answer
   x = 5,846.49