Finding the Third Proportional to 290,228 and 448,475.50

Step by Step Solution

1. Step 1: Write the proportion equation
   290,228 : 448,475.50 = 448,475.50 : x
2. Step 2: Convert to fraction form
   290,228/448,475.50 = 448,475.50/x
3. Step 3: Cross multiply
   290,228x = 448,475.50 × 448,475.50
4. Step 4: Simplify right side
   290,228x = 201,130,274,100.25
5. Step 5: Solve for x
   x = 201,130,274,100.25/290,228
6. Step 6: Final answer
   x = 693,007.82