Finding the Third Proportional to 89,120 and 208,304

Step by Step Solution

1. Step 1: Write the proportion equation
   89,120 : 208,304 = 208,304 : x
2. Step 2: Convert to fraction form
   89,120/208,304 = 208,304/x
3. Step 3: Cross multiply
   89,120x = 208,304 × 208,304
4. Step 4: Simplify right side
   89,120x = 43,390,556,416
5. Step 5: Solve for x
   x = 43,390,556,416/89,120
6. Step 6: Final answer
   x = 486,877.88