Finding the Third Proportional to 178,490 and 388,082

Step by Step Solution

1. Step 1: Write the proportion equation
   178,490 : 388,082 = 388,082 : x
2. Step 2: Convert to fraction form
   178,490/388,082 = 388,082/x
3. Step 3: Cross multiply
   178,490x = 388,082 × 388,082
4. Step 4: Simplify right side
   178,490x = 150,607,638,724
5. Step 5: Solve for x
   x = 150,607,638,724/178,490
6. Step 6: Final answer
   x = 843,787.54