Finding the Third Proportional to 164,320.50 and 336,429

Step by Step Solution

1. Step 1: Write the proportion equation
   164,320.50 : 336,429 = 336,429 : x
2. Step 2: Convert to fraction form
   164,320.50/336,429 = 336,429/x
3. Step 3: Cross multiply
   164,320.50x = 336,429 × 336,429
4. Step 4: Simplify right side
   164,320.50x = 113,184,472,041
5. Step 5: Solve for x
   x = 113,184,472,041/164,320.50
6. Step 6: Final answer
   x = 688,803.11