Finding the Fourth Proportional to 14,366.28, 21,549.38 and 3,978

Step by Step Solution

1. Step 1: Write the proportion equation
   14,366.28 : 21,549.38 = 3,978 : x
2. Step 2: Convert to fraction form
   14,366.28/21,549.38 = 3,978/x
3. Step 3: Cross multiply
   14,366.28x = 21,549.38 × 3,978
4. Step 4: Simplify right side
   14,366.28x = 85,723,433.64
5. Step 5: Solve for x
   x = 85,723,433.64/14,366.28
6. Step 6: Final answer
   x = 5,966.99