Finding the Third Proportional to 290,409.31 and 629,075.69

Step by Step Solution

1. Step 1: Write the proportion equation
   290,409.31 : 629,075.69 = 629,075.69 : x
2. Step 2: Convert to fraction form
   290,409.31/629,075.69 = 629,075.69/x
3. Step 3: Cross multiply
   290,409.31x = 629,075.69 × 629,075.69
4. Step 4: Simplify right side
   290,409.31x = 395,736,220,603.60
5. Step 5: Solve for x
   x = 395,736,220,603.60/290,409.31
6. Step 6: Final answer
   x = 1,362,684.33