Finding the Fourth Proportional to 10,837.20, 16,259.72 and 4,259.76

Step by Step Solution

1. Step 1: Write the proportion equation
   10,837.20 : 16,259.72 = 4,259.76 : x
2. Step 2: Convert to fraction form
   10,837.20/16,259.72 = 4,259.76/x
3. Step 3: Cross multiply
   10,837.20x = 16,259.72 × 4,259.76
4. Step 4: Simplify right side
   10,837.20x = 69,262,504.87
5. Step 5: Solve for x
   x = 69,262,504.87/10,837.20
6. Step 6: Final answer
   x = 6,391.18