Finding the Third Proportional to 158,358 and 329,820

Step by Step Solution

1. Step 1: Write the proportion equation
   158,358 : 329,820 = 329,820 : x
2. Step 2: Convert to fraction form
   158,358/329,820 = 329,820/x
3. Step 3: Cross multiply
   158,358x = 329,820 × 329,820
4. Step 4: Simplify right side
   158,358x = 108,781,232,400
5. Step 5: Solve for x
   x = 108,781,232,400/158,358
6. Step 6: Final answer
   x = 686,932.35