Finding the Third Proportional to 248,367 and 393,448.50

Step by Step Solution

1. Step 1: Write the proportion equation
   248,367 : 393,448.50 = 393,448.50 : x
2. Step 2: Convert to fraction form
   248,367/393,448.50 = 393,448.50/x
3. Step 3: Cross multiply
   248,367x = 393,448.50 × 393,448.50
4. Step 4: Simplify right side
   248,367x = 154,801,722,152.25
5. Step 5: Solve for x
   x = 154,801,722,152.25/248,367
6. Step 6: Final answer
   x = 623,278.14