Finding the Third Proportional to 155,602 and 316,910

Step by Step Solution

1. Step 1: Write the proportion equation
   155,602 : 316,910 = 316,910 : x
2. Step 2: Convert to fraction form
   155,602/316,910 = 316,910/x
3. Step 3: Cross multiply
   155,602x = 316,910 × 316,910
4. Step 4: Simplify right side
   155,602x = 100,431,948,100
5. Step 5: Solve for x
   x = 100,431,948,100/155,602
6. Step 6: Final answer
   x = 645,441.24