Finding the Third Proportional to 139,755 and 215,070

Step by Step Solution

1. Step 1: Write the proportion equation
   139,755 : 215,070 = 215,070 : x
2. Step 2: Convert to fraction form
   139,755/215,070 = 215,070/x
3. Step 3: Cross multiply
   139,755x = 215,070 × 215,070
4. Step 4: Simplify right side
   139,755x = 46,255,104,900
5. Step 5: Solve for x
   x = 46,255,104,900/139,755
6. Step 6: Final answer
   x = 330,972.81