Finding the Third Proportional to 248,913 and 386,066.25

Step by Step Solution

1. Step 1: Write the proportion equation
   248,913 : 386,066.25 = 386,066.25 : x
2. Step 2: Convert to fraction form
   248,913/386,066.25 = 386,066.25/x
3. Step 3: Cross multiply
   248,913x = 386,066.25 × 386,066.25
4. Step 4: Simplify right side
   248,913x = 149,047,149,389.06
5. Step 5: Solve for x
   x = 149,047,149,389.06/248,913
6. Step 6: Final answer
   x = 598,792.15