Finding the Third Proportional to 309,678.75 and 452,566.69

Step by Step Solution

1. Step 1: Write the proportion equation
   309,678.75 : 452,566.69 = 452,566.69 : x
2. Step 2: Convert to fraction form
   309,678.75/452,566.69 = 452,566.69/x
3. Step 3: Cross multiply
   309,678.75x = 452,566.69 × 452,566.69
4. Step 4: Simplify right side
   309,678.75x = 204,816,606,634.72
5. Step 5: Solve for x
   x = 204,816,606,634.72/309,678.75
6. Step 6: Final answer
   x = 661,384.12