Finding the Fourth Proportional to 10,905.53, 16,363.15 and 3,978.41

Step by Step Solution

1. Step 1: Write the proportion equation
   10,905.53 : 16,363.15 = 3,978.41 : x
2. Step 2: Convert to fraction form
   10,905.53/16,363.15 = 3,978.41/x
3. Step 3: Cross multiply
   10,905.53x = 16,363.15 × 3,978.41
4. Step 4: Simplify right side
   10,905.53x = 65,099,319.59
5. Step 5: Solve for x
   x = 65,099,319.59/10,905.53
6. Step 6: Final answer
   x = 5,969.39