Finding the Fourth Proportional to 10,889.90, 16,340.25 and 4,315.94

Step by Step Solution

1. Step 1: Write the proportion equation
   10,889.90 : 16,340.25 = 4,315.94 : x
2. Step 2: Convert to fraction form
   10,889.90/16,340.25 = 4,315.94/x
3. Step 3: Cross multiply
   10,889.90x = 16,340.25 × 4,315.94
4. Step 4: Simplify right side
   10,889.90x = 70,523,538.59
5. Step 5: Solve for x
   x = 70,523,538.59/10,889.90
6. Step 6: Final answer
   x = 6,476.05