Finding the Third Proportional to 315,495 and 442,693.50

Step by Step Solution

1. Step 1: Write the proportion equation
   315,495 : 442,693.50 = 442,693.50 : x
2. Step 2: Convert to fraction form
   315,495/442,693.50 = 442,693.50/x
3. Step 3: Cross multiply
   315,495x = 442,693.50 × 442,693.50
4. Step 4: Simplify right side
   315,495x = 195,977,534,942.25
5. Step 5: Solve for x
   x = 195,977,534,942.25/315,495
6. Step 6: Final answer
   x = 621,174.77