Finding the Third Proportional to 290,240.50 and 448,300.50

Step by Step Solution

1. Step 1: Write the proportion equation
   290,240.50 : 448,300.50 = 448,300.50 : x
2. Step 2: Convert to fraction form
   290,240.50/448,300.50 = 448,300.50/x
3. Step 3: Cross multiply
   290,240.50x = 448,300.50 × 448,300.50
4. Step 4: Simplify right side
   290,240.50x = 200,973,338,300.25
5. Step 5: Solve for x
   x = 200,973,338,300.25/290,240.50
6. Step 6: Final answer
   x = 692,437.27