Finding the Third Proportional to 15,405.75 and 31,979.25

Step by Step Solution

1. Step 1: Write the proportion equation
   15,405.75 : 31,979.25 = 31,979.25 : x
2. Step 2: Convert to fraction form
   15,405.75/31,979.25 = 31,979.25/x
3. Step 3: Cross multiply
   15,405.75x = 31,979.25 × 31,979.25
4. Step 4: Simplify right side
   15,405.75x = 1,022,672,430.56
5. Step 5: Solve for x
   x = 1,022,672,430.56/15,405.75
6. Step 6: Final answer
   x = 66,382.52