Finding the Third Proportional to 248,613 and 385,645.50

Step by Step Solution

1. Step 1: Write the proportion equation
   248,613 : 385,645.50 = 385,645.50 : x
2. Step 2: Convert to fraction form
   248,613/385,645.50 = 385,645.50/x
3. Step 3: Cross multiply
   248,613x = 385,645.50 × 385,645.50
4. Step 4: Simplify right side
   248,613x = 148,722,451,670.25
5. Step 5: Solve for x
   x = 148,722,451,670.25/248,613
6. Step 6: Final answer
   x = 598,208.67