Finding the Third Proportional to 436,293 and 640,075.50

Step by Step Solution

1. Step 1: Write the proportion equation
   436,293 : 640,075.50 = 640,075.50 : x
2. Step 2: Convert to fraction form
   436,293/640,075.50 = 640,075.50/x
3. Step 3: Cross multiply
   436,293x = 640,075.50 × 640,075.50
4. Step 4: Simplify right side
   436,293x = 409,696,645,700.25
5. Step 5: Solve for x
   x = 409,696,645,700.25/436,293
6. Step 6: Final answer
   x = 939,040.15