Finding the Third Proportional to 290,713.50 and 623,454

Step by Step Solution

1. Step 1: Write the proportion equation
   290,713.50 : 623,454 = 623,454 : x
2. Step 2: Convert to fraction form
   290,713.50/623,454 = 623,454/x
3. Step 3: Cross multiply
   290,713.50x = 623,454 × 623,454
4. Step 4: Simplify right side
   290,713.50x = 388,694,890,116
5. Step 5: Solve for x
   x = 388,694,890,116/290,713.50
6. Step 6: Final answer
   x = 1,337,037.63