Finding the Third Proportional to 290,229 and 448,477.50

Step by Step Solution

1. Step 1: Write the proportion equation
   290,229 : 448,477.50 = 448,477.50 : x
2. Step 2: Convert to fraction form
   290,229/448,477.50 = 448,477.50/x
3. Step 3: Cross multiply
   290,229x = 448,477.50 × 448,477.50
4. Step 4: Simplify right side
   290,229x = 201,132,068,006.25
5. Step 5: Solve for x
   x = 201,132,068,006.25/290,229
6. Step 6: Final answer
   x = 693,011.61