Finding the Fourth Proportional to 10,963.30, 16,447.35 and 5,419.30

Step by Step Solution

1. Step 1: Write the proportion equation
   10,963.30 : 16,447.35 = 5,419.30 : x
2. Step 2: Convert to fraction form
   10,963.30/16,447.35 = 5,419.30/x
3. Step 3: Cross multiply
   10,963.30x = 16,447.35 × 5,419.30
4. Step 4: Simplify right side
   10,963.30x = 89,133,123.86
5. Step 5: Solve for x
   x = 89,133,123.86/10,963.30
6. Step 6: Final answer
   x = 8,130.14