Finding the Third Proportional to 316,634.50 and 646,184

Step by Step Solution

1. Step 1: Write the proportion equation
   316,634.50 : 646,184 = 646,184 : x
2. Step 2: Convert to fraction form
   316,634.50/646,184 = 646,184/x
3. Step 3: Cross multiply
   316,634.50x = 646,184 × 646,184
4. Step 4: Simplify right side
   316,634.50x = 417,553,761,856
5. Step 5: Solve for x
   x = 417,553,761,856/316,634.50
6. Step 6: Final answer
   x = 1,318,724.78