Finding the Fourth Proportional to 11,245, 16,868.31 and 4,319.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,245 : 16,868.31 = 4,319.50 : x
2. Step 2: Convert to fraction form
   11,245/16,868.31 = 4,319.50/x
3. Step 3: Cross multiply
   11,245x = 16,868.31 × 4,319.50
4. Step 4: Simplify right side
   11,245x = 72,862,665.05
5. Step 5: Solve for x
   x = 72,862,665.05/11,245
6. Step 6: Final answer
   x = 6,479.56