Finding the Fourth Proportional to 3,980.22, 5,971.34 and 2,812.52

Step by Step Solution

1. Step 1: Write the proportion equation
   3,980.22 : 5,971.34 = 2,812.52 : x
2. Step 2: Convert to fraction form
   3,980.22/5,971.34 = 2,812.52/x
3. Step 3: Cross multiply
   3,980.22x = 5,971.34 × 2,812.52
4. Step 4: Simplify right side
   3,980.22x = 16,794,513.18
5. Step 5: Solve for x
   x = 16,794,513.18/3,980.22
6. Step 6: Final answer
   x = 4,219.49