Finding the Third Proportional to 309,645.75 and 436,038

Step by Step Solution

1. Step 1: Write the proportion equation
   309,645.75 : 436,038 = 436,038 : x
2. Step 2: Convert to fraction form
   309,645.75/436,038 = 436,038/x
3. Step 3: Cross multiply
   309,645.75x = 436,038 × 436,038
4. Step 4: Simplify right side
   309,645.75x = 190,129,137,444
5. Step 5: Solve for x
   x = 190,129,137,444/309,645.75
6. Step 6: Final answer
   x = 614,021.47