Finding the Fourth Proportional to 3,980.87, 5,971.59 and 1,207.29

Step by Step Solution

1. Step 1: Write the proportion equation
   3,980.87 : 5,971.59 = 1,207.29 : x
2. Step 2: Convert to fraction form
   3,980.87/5,971.59 = 1,207.29/x
3. Step 3: Cross multiply
   3,980.87x = 5,971.59 × 1,207.29
4. Step 4: Simplify right side
   3,980.87x = 7,209,440.89
5. Step 5: Solve for x
   x = 7,209,440.89/3,980.87
6. Step 6: Final answer
   x = 1,811.02