Finding the Fourth Proportional to 3,978.51, 5,967.76 and 1,381.45

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.51 : 5,967.76 = 1,381.45 : x
2. Step 2: Convert to fraction form
   3,978.51/5,967.76 = 1,381.45/x
3. Step 3: Cross multiply
   3,978.51x = 5,967.76 × 1,381.45
4. Step 4: Simplify right side
   3,978.51x = 8,244,162.05
5. Step 5: Solve for x
   x = 8,244,162.05/3,978.51
6. Step 6: Final answer
   x = 2,072.17