Finding the Third Proportional to 408,276 and 612,822.38

Step by Step Solution

1. Step 1: Write the proportion equation
   408,276 : 612,822.38 = 612,822.38 : x
2. Step 2: Convert to fraction form
   408,276/612,822.38 = 612,822.38/x
3. Step 3: Cross multiply
   408,276x = 612,822.38 × 612,822.38
4. Step 4: Simplify right side
   408,276x = 375,551,263,300.64
5. Step 5: Solve for x
   x = 375,551,263,300.64/408,276
6. Step 6: Final answer
   x = 919,846.53