Finding the Third Proportional to 144,078.25 and 316,181.50

Step by Step Solution

1. Step 1: Write the proportion equation
   144,078.25 : 316,181.50 = 316,181.50 : x
2. Step 2: Convert to fraction form
   144,078.25/316,181.50 = 316,181.50/x
3. Step 3: Cross multiply
   144,078.25x = 316,181.50 × 316,181.50
4. Step 4: Simplify right side
   144,078.25x = 99,970,740,942.25
5. Step 5: Solve for x
   x = 99,970,740,942.25/144,078.25
6. Step 6: Final answer
   x = 693,864.21