Finding the Fourth Proportional to 3,980.05, 5,962.78 and 2,881.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,980.05 : 5,962.78 = 2,881.69 : x
2. Step 2: Convert to fraction form
   3,980.05/5,962.78 = 2,881.69/x
3. Step 3: Cross multiply
   3,980.05x = 5,962.78 × 2,881.69
4. Step 4: Simplify right side
   3,980.05x = 17,182,883.50
5. Step 5: Solve for x
   x = 17,182,883.50/3,980.05
6. Step 6: Final answer
   x = 4,317.25