Finding the Third Proportional to 30,825.28 and 66,328.31

Step by Step Solution

1. Step 1: Write the proportion equation
   30,825.28 : 66,328.31 = 66,328.31 : x
2. Step 2: Convert to fraction form
   30,825.28/66,328.31 = 66,328.31/x
3. Step 3: Cross multiply
   30,825.28x = 66,328.31 × 66,328.31
4. Step 4: Simplify right side
   30,825.28x = 4,399,445,039.10
5. Step 5: Solve for x
   x = 4,399,445,039.10/30,825.28
6. Step 6: Final answer
   x = 142,721.98