Finding the Third Proportional to 30,724.31 and 67,386.94

Step by Step Solution

1. Step 1: Write the proportion equation
   30,724.31 : 67,386.94 = 67,386.94 : x
2. Step 2: Convert to fraction form
   30,724.31/67,386.94 = 67,386.94/x
3. Step 3: Cross multiply
   30,724.31x = 67,386.94 × 67,386.94
4. Step 4: Simplify right side
   30,724.31x = 4,540,999,345.63
5. Step 5: Solve for x
   x = 4,540,999,345.63/30,724.31
6. Step 6: Final answer
   x = 147,798.24