Finding the Fourth Proportional to 10,907.98, 16,253.74 and 10,379.05

Step by Step Solution

1. Step 1: Write the proportion equation
   10,907.98 : 16,253.74 = 10,379.05 : x
2. Step 2: Convert to fraction form
   10,907.98/16,253.74 = 10,379.05/x
3. Step 3: Cross multiply
   10,907.98x = 16,253.74 × 10,379.05
4. Step 4: Simplify right side
   10,907.98x = 168,698,380.15
5. Step 5: Solve for x
   x = 168,698,380.15/10,907.98
6. Step 6: Final answer
   x = 15,465.59