Finding the Third Proportional to 276,268 and 415,427.50

Step by Step Solution

1. Step 1: Write the proportion equation
   276,268 : 415,427.50 = 415,427.50 : x
2. Step 2: Convert to fraction form
   276,268/415,427.50 = 415,427.50/x
3. Step 3: Cross multiply
   276,268x = 415,427.50 × 415,427.50
4. Step 4: Simplify right side
   276,268x = 172,580,007,756.25
5. Step 5: Solve for x
   x = 172,580,007,756.25/276,268
6. Step 6: Final answer
   x = 624,683.31