Finding the Third Proportional to 150,916 and 316,520

Step by Step Solution

1. Step 1: Write the proportion equation
   150,916 : 316,520 = 316,520 : x
2. Step 2: Convert to fraction form
   150,916/316,520 = 316,520/x
3. Step 3: Cross multiply
   150,916x = 316,520 × 316,520
4. Step 4: Simplify right side
   150,916x = 100,184,910,400
5. Step 5: Solve for x
   x = 100,184,910,400/150,916
6. Step 6: Final answer
   x = 663,845.52