Finding the Third Proportional to 139,630.50 and 215,763.75

Step by Step Solution

1. Step 1: Write the proportion equation
   139,630.50 : 215,763.75 = 215,763.75 : x
2. Step 2: Convert to fraction form
   139,630.50/215,763.75 = 215,763.75/x
3. Step 3: Cross multiply
   139,630.50x = 215,763.75 × 215,763.75
4. Step 4: Simplify right side
   139,630.50x = 46,553,995,814.06
5. Step 5: Solve for x
   x = 46,553,995,814.06/139,630.50
6. Step 6: Final answer
   x = 333,408.50