Finding the Third Proportional to 175,515 and 342,280.50

Step by Step Solution

1. Step 1: Write the proportion equation
   175,515 : 342,280.50 = 342,280.50 : x
2. Step 2: Convert to fraction form
   175,515/342,280.50 = 342,280.50/x
3. Step 3: Cross multiply
   175,515x = 342,280.50 × 342,280.50
4. Step 4: Simplify right side
   175,515x = 117,155,940,680.25
5. Step 5: Solve for x
   x = 117,155,940,680.25/175,515
6. Step 6: Final answer
   x = 667,498.17