Finding the Third Proportional to 290,061 and 448,211.25

Step by Step Solution

1. Step 1: Write the proportion equation
   290,061 : 448,211.25 = 448,211.25 : x
2. Step 2: Convert to fraction form
   290,061/448,211.25 = 448,211.25/x
3. Step 3: Cross multiply
   290,061x = 448,211.25 × 448,211.25
4. Step 4: Simplify right side
   290,061x = 200,893,324,626.56
5. Step 5: Solve for x
   x = 200,893,324,626.56/290,061
6. Step 6: Final answer
   x = 692,589.92