Finding the Third Proportional to 64,584 and 139,360

Step by Step Solution

1. Step 1: Write the proportion equation
   64,584 : 139,360 = 139,360 : x
2. Step 2: Convert to fraction form
   64,584/139,360 = 139,360/x
3. Step 3: Cross multiply
   64,584x = 139,360 × 139,360
4. Step 4: Simplify right side
   64,584x = 19,421,209,600
5. Step 5: Solve for x
   x = 19,421,209,600/64,584
6. Step 6: Final answer
   x = 300,712.40