Finding the Third Proportional to 139,377 and 210,370.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,377 : 210,370.50 = 210,370.50 : x
2. Step 2: Convert to fraction form
   139,377/210,370.50 = 210,370.50/x
3. Step 3: Cross multiply
   139,377x = 210,370.50 × 210,370.50
4. Step 4: Simplify right side
   139,377x = 44,255,747,270.25
5. Step 5: Solve for x
   x = 44,255,747,270.25/139,377
6. Step 6: Final answer
   x = 317,525.47