Finding the Third Proportional to 63,171.25 and 137,478.50

Step by Step Solution

1. Step 1: Write the proportion equation
   63,171.25 : 137,478.50 = 137,478.50 : x
2. Step 2: Convert to fraction form
   63,171.25/137,478.50 = 137,478.50/x
3. Step 3: Cross multiply
   63,171.25x = 137,478.50 × 137,478.50
4. Step 4: Simplify right side
   63,171.25x = 18,900,337,962.25
5. Step 5: Solve for x
   x = 18,900,337,962.25/63,171.25
6. Step 6: Final answer
   x = 299,192.08