Finding the Third Proportional to 66,328 and 139,064

Step by Step Solution

1. Step 1: Write the proportion equation
   66,328 : 139,064 = 139,064 : x
2. Step 2: Convert to fraction form
   66,328/139,064 = 139,064/x
3. Step 3: Cross multiply
   66,328x = 139,064 × 139,064
4. Step 4: Simplify right side
   66,328x = 19,338,796,096
5. Step 5: Solve for x
   x = 19,338,796,096/66,328
6. Step 6: Final answer
   x = 291,563.08