Finding the Third Proportional to 154,818 and 316,196

Step by Step Solution

1. Step 1: Write the proportion equation
   154,818 : 316,196 = 316,196 : x
2. Step 2: Convert to fraction form
   154,818/316,196 = 316,196/x
3. Step 3: Cross multiply
   154,818x = 316,196 × 316,196
4. Step 4: Simplify right side
   154,818x = 99,979,910,416
5. Step 5: Solve for x
   x = 99,979,910,416/154,818
6. Step 6: Final answer
   x = 645,789.96