Finding the Fourth Proportional to 12,301.72, 18,454.43 and 3,978.97

Step by Step Solution

1. Step 1: Write the proportion equation
   12,301.72 : 18,454.43 = 3,978.97 : x
2. Step 2: Convert to fraction form
   12,301.72/18,454.43 = 3,978.97/x
3. Step 3: Cross multiply
   12,301.72x = 18,454.43 × 3,978.97
4. Step 4: Simplify right side
   12,301.72x = 73,429,623.34
5. Step 5: Solve for x
   x = 73,429,623.34/12,301.72
6. Step 6: Final answer
   x = 5,969.05