Finding the Third Proportional to 309,657.38 and 436,068.56

Step by Step Solution

1. Step 1: Write the proportion equation
   309,657.38 : 436,068.56 = 436,068.56 : x
2. Step 2: Convert to fraction form
   309,657.38/436,068.56 = 436,068.56/x
3. Step 3: Cross multiply
   309,657.38x = 436,068.56 × 436,068.56
4. Step 4: Simplify right side
   309,657.38x = 190,155,791,200.82
5. Step 5: Solve for x
   x = 190,155,791,200.82/309,657.38
6. Step 6: Final answer
   x = 614,084.49