Finding the Third Proportional to 276,339 and 422,527.50

Step by Step Solution

1. Step 1: Write the proportion equation
   276,339 : 422,527.50 = 422,527.50 : x
2. Step 2: Convert to fraction form
   276,339/422,527.50 = 422,527.50/x
3. Step 3: Cross multiply
   276,339x = 422,527.50 × 422,527.50
4. Step 4: Simplify right side
   276,339x = 178,529,488,256.25
5. Step 5: Solve for x
   x = 178,529,488,256.25/276,339
6. Step 6: Final answer
   x = 646,052.45