Finding the Third Proportional to 276,621 and 413,158.50

Step by Step Solution

1. Step 1: Write the proportion equation
   276,621 : 413,158.50 = 413,158.50 : x
2. Step 2: Convert to fraction form
   276,621/413,158.50 = 413,158.50/x
3. Step 3: Cross multiply
   276,621x = 413,158.50 × 413,158.50
4. Step 4: Simplify right side
   276,621x = 170,699,946,122.25
5. Step 5: Solve for x
   x = 170,699,946,122.25/276,621
6. Step 6: Final answer
   x = 617,089.61