Finding the Fourth Proportional to 3,980.56, 5,967.72 and 2,516.64

Step by Step Solution

1. Step 1: Write the proportion equation
   3,980.56 : 5,967.72 = 2,516.64 : x
2. Step 2: Convert to fraction form
   3,980.56/5,967.72 = 2,516.64/x
3. Step 3: Cross multiply
   3,980.56x = 5,967.72 × 2,516.64
4. Step 4: Simplify right side
   3,980.56x = 15,018,602.86
5. Step 5: Solve for x
   x = 15,018,602.86/3,980.56
6. Step 6: Final answer
   x = 3,772.99