Finding the Third Proportional to 148,676 and 316,558

Step by Step Solution

1. Step 1: Write the proportion equation
   148,676 : 316,558 = 316,558 : x
2. Step 2: Convert to fraction form
   148,676/316,558 = 316,558/x
3. Step 3: Cross multiply
   148,676x = 316,558 × 316,558
4. Step 4: Simplify right side
   148,676x = 100,208,967,364
5. Step 5: Solve for x
   x = 100,208,967,364/148,676
6. Step 6: Final answer
   x = 674,009.04