Finding the Fourth Proportional to 10,915.38, 16,373.79 and 3,994.74

Step by Step Solution

1. Step 1: Write the proportion equation
   10,915.38 : 16,373.79 = 3,994.74 : x
2. Step 2: Convert to fraction form
   10,915.38/16,373.79 = 3,994.74/x
3. Step 3: Cross multiply
   10,915.38x = 16,373.79 × 3,994.74
4. Step 4: Simplify right side
   10,915.38x = 65,409,033.86
5. Step 5: Solve for x
   x = 65,409,033.86/10,915.38
6. Step 6: Final answer
   x = 5,992.37