Finding the Third Proportional to 136,492 and 209,060

Step by Step Solution

1. Step 1: Write the proportion equation
   136,492 : 209,060 = 209,060 : x
2. Step 2: Convert to fraction form
   136,492/209,060 = 209,060/x
3. Step 3: Cross multiply
   136,492x = 209,060 × 209,060
4. Step 4: Simplify right side
   136,492x = 43,706,083,600
5. Step 5: Solve for x
   x = 43,706,083,600/136,492
6. Step 6: Final answer
   x = 320,209.86