Finding the Fourth Proportional to 14,286.78, 21,428.69 and 4,426.14

Step by Step Solution

1. Step 1: Write the proportion equation
   14,286.78 : 21,428.69 = 4,426.14 : x
2. Step 2: Convert to fraction form
   14,286.78/21,428.69 = 4,426.14/x
3. Step 3: Cross multiply
   14,286.78x = 21,428.69 × 4,426.14
4. Step 4: Simplify right side
   14,286.78x = 94,846,458.86
5. Step 5: Solve for x
   x = 94,846,458.86/14,286.78
6. Step 6: Final answer
   x = 6,638.76