Finding the Third Proportional to 158,184 and 329,490

Step by Step Solution

1. Step 1: Write the proportion equation
   158,184 : 329,490 = 329,490 : x
2. Step 2: Convert to fraction form
   158,184/329,490 = 329,490/x
3. Step 3: Cross multiply
   158,184x = 329,490 × 329,490
4. Step 4: Simplify right side
   158,184x = 108,563,660,100
5. Step 5: Solve for x
   x = 108,563,660,100/158,184
6. Step 6: Final answer
   x = 686,312.52