Finding the Third Proportional to 5,978.65 and 13,090.20

Step by Step Solution

1. Step 1: Write the proportion equation
   5,978.65 : 13,090.20 = 13,090.20 : x
2. Step 2: Convert to fraction form
   5,978.65/13,090.20 = 13,090.20/x
3. Step 3: Cross multiply
   5,978.65x = 13,090.20 × 13,090.20
4. Step 4: Simplify right side
   5,978.65x = 171,353,366.72
5. Step 5: Solve for x
   x = 171,353,366.72/5,978.65
6. Step 6: Final answer
   x = 28,660.86