Finding the Third Proportional to 290,115 and 623,083.50

Step by Step Solution

1. Step 1: Write the proportion equation
   290,115 : 623,083.50 = 623,083.50 : x
2. Step 2: Convert to fraction form
   290,115/623,083.50 = 623,083.50/x
3. Step 3: Cross multiply
   290,115x = 623,083.50 × 623,083.50
4. Step 4: Simplify right side
   290,115x = 388,233,047,972.25
5. Step 5: Solve for x
   x = 388,233,047,972.25/290,115
6. Step 6: Final answer
   x = 1,338,203.98