Finding the Third Proportional to 345,388 and 459,078

Step by Step Solution

1. Step 1: Write the proportion equation
   345,388 : 459,078 = 459,078 : x
2. Step 2: Convert to fraction form
   345,388/459,078 = 459,078/x
3. Step 3: Cross multiply
   345,388x = 459,078 × 459,078
4. Step 4: Simplify right side
   345,388x = 210,752,610,084
5. Step 5: Solve for x
   x = 210,752,610,084/345,388
6. Step 6: Final answer
   x = 610,190.89