Finding the Third Proportional to 139,117.50 and 200,961

Step by Step Solution

1. Step 1: Write the proportion equation
   139,117.50 : 200,961 = 200,961 : x
2. Step 2: Convert to fraction form
   139,117.50/200,961 = 200,961/x
3. Step 3: Cross multiply
   139,117.50x = 200,961 × 200,961
4. Step 4: Simplify right side
   139,117.50x = 40,385,323,521
5. Step 5: Solve for x
   x = 40,385,323,521/139,117.50
6. Step 6: Final answer
   x = 290,296.50