Finding the Third Proportional to 276,709.50 and 423,093.38

Step by Step Solution

1. Step 1: Write the proportion equation
   276,709.50 : 423,093.38 = 423,093.38 : x
2. Step 2: Convert to fraction form
   276,709.50/423,093.38 = 423,093.38/x
3. Step 3: Cross multiply
   276,709.50x = 423,093.38 × 423,093.38
4. Step 4: Simplify right side
   276,709.50x = 179,008,003,968.89
5. Step 5: Solve for x
   x = 179,008,003,968.89/276,709.50
6. Step 6: Final answer
   x = 646,916.73