Finding the Third Proportional to 296,346 and 640,075.50

Step by Step Solution

1. Step 1: Write the proportion equation
   296,346 : 640,075.50 = 640,075.50 : x
2. Step 2: Convert to fraction form
   296,346/640,075.50 = 640,075.50/x
3. Step 3: Cross multiply
   296,346x = 640,075.50 × 640,075.50
4. Step 4: Simplify right side
   296,346x = 409,696,645,700.25
5. Step 5: Solve for x
   x = 409,696,645,700.25/296,346
6. Step 6: Final answer
   x = 1,382,494.27