Finding the Third Proportional to 155,857.50 and 336,039

Step by Step Solution

1. Step 1: Write the proportion equation
   155,857.50 : 336,039 = 336,039 : x
2. Step 2: Convert to fraction form
   155,857.50/336,039 = 336,039/x
3. Step 3: Cross multiply
   155,857.50x = 336,039 × 336,039
4. Step 4: Simplify right side
   155,857.50x = 112,922,209,521
5. Step 5: Solve for x
   x = 112,922,209,521/155,857.50
6. Step 6: Final answer
   x = 724,522.14