Finding the Third Proportional to 139,509 and 310,014

Step by Step Solution

1. Step 1: Write the proportion equation
   139,509 : 310,014 = 310,014 : x
2. Step 2: Convert to fraction form
   139,509/310,014 = 310,014/x
3. Step 3: Cross multiply
   139,509x = 310,014 × 310,014
4. Step 4: Simplify right side
   139,509x = 96,108,680,196
5. Step 5: Solve for x
   x = 96,108,680,196/139,509
6. Step 6: Final answer
   x = 688,906.67