Finding the Third Proportional to 290,245.50 and 448,308

Step by Step Solution

1. Step 1: Write the proportion equation
   290,245.50 : 448,308 = 448,308 : x
2. Step 2: Convert to fraction form
   290,245.50/448,308 = 448,308/x
3. Step 3: Cross multiply
   290,245.50x = 448,308 × 448,308
4. Step 4: Simplify right side
   290,245.50x = 200,980,062,864
5. Step 5: Solve for x
   x = 200,980,062,864/290,245.50
6. Step 6: Final answer
   x = 692,448.51