Finding the Third Proportional to 309,649.50 and 436,042.50

Step by Step Solution

1. Step 1: Write the proportion equation
   309,649.50 : 436,042.50 = 436,042.50 : x
2. Step 2: Convert to fraction form
   309,649.50/436,042.50 = 436,042.50/x
3. Step 3: Cross multiply
   309,649.50x = 436,042.50 × 436,042.50
4. Step 4: Simplify right side
   309,649.50x = 190,133,061,806.25
5. Step 5: Solve for x
   x = 190,133,061,806.25/309,649.50
6. Step 6: Final answer
   x = 614,026.70