Finding the Fourth Proportional to 14,298.28, 21,447.78 and 3,910.12

Step by Step Solution

1. Step 1: Write the proportion equation
   14,298.28 : 21,447.78 = 3,910.12 : x
2. Step 2: Convert to fraction form
   14,298.28/21,447.78 = 3,910.12/x
3. Step 3: Cross multiply
   14,298.28x = 21,447.78 × 3,910.12
4. Step 4: Simplify right side
   14,298.28x = 83,863,393.53
5. Step 5: Solve for x
   x = 83,863,393.53/14,298.28
6. Step 6: Final answer
   x = 5,865.28