Finding the Fourth Proportional to 10,915.74, 16,373.82 and 3,520.86

Step by Step Solution

1. Step 1: Write the proportion equation
   10,915.74 : 16,373.82 = 3,520.86 : x
2. Step 2: Convert to fraction form
   10,915.74/16,373.82 = 3,520.86/x
3. Step 3: Cross multiply
   10,915.74x = 16,373.82 × 3,520.86
4. Step 4: Simplify right side
   10,915.74x = 57,649,927.89
5. Step 5: Solve for x
   x = 57,649,927.89/10,915.74
6. Step 6: Final answer
   x = 5,281.36