Finding the Third Proportional to 299,181.38 and 648,207

Step by Step Solution

1. Step 1: Write the proportion equation
   299,181.38 : 648,207 = 648,207 : x
2. Step 2: Convert to fraction form
   299,181.38/648,207 = 648,207/x
3. Step 3: Cross multiply
   299,181.38x = 648,207 × 648,207
4. Step 4: Simplify right side
   299,181.38x = 420,172,314,849
5. Step 5: Solve for x
   x = 420,172,314,849/299,181.38
6. Step 6: Final answer
   x = 1,404,406.66