Finding the Third Proportional to 276,630 and 417,487.50

Step by Step Solution

1. Step 1: Write the proportion equation
   276,630 : 417,487.50 = 417,487.50 : x
2. Step 2: Convert to fraction form
   276,630/417,487.50 = 417,487.50/x
3. Step 3: Cross multiply
   276,630x = 417,487.50 × 417,487.50
4. Step 4: Simplify right side
   276,630x = 174,295,812,656.25
5. Step 5: Solve for x
   x = 174,295,812,656.25/276,630
6. Step 6: Final answer
   x = 630,068.37