Finding the Third Proportional to 63,405 and 137,377.50

Step by Step Solution

1. Step 1: Write the proportion equation
   63,405 : 137,377.50 = 137,377.50 : x
2. Step 2: Convert to fraction form
   63,405/137,377.50 = 137,377.50/x
3. Step 3: Cross multiply
   63,405x = 137,377.50 × 137,377.50
4. Step 4: Simplify right side
   63,405x = 18,872,577,506.25
5. Step 5: Solve for x
   x = 18,872,577,506.25/63,405
6. Step 6: Final answer
   x = 297,651.25