Finding the Fourth Proportional to 10,972.26, 16,437.72 and 5,419.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,972.26 : 16,437.72 = 5,419.10 : x
2. Step 2: Convert to fraction form
   10,972.26/16,437.72 = 5,419.10/x
3. Step 3: Cross multiply
   10,972.26x = 16,437.72 × 5,419.10
4. Step 4: Simplify right side
   10,972.26x = 89,077,648.45
5. Step 5: Solve for x
   x = 89,077,648.45/10,972.26
6. Step 6: Final answer
   x = 8,118.44