Finding the Third Proportional to 309,065.63 and 662,488.88

Step by Step Solution

1. Step 1: Write the proportion equation
   309,065.63 : 662,488.88 = 662,488.88 : x
2. Step 2: Convert to fraction form
   309,065.63/662,488.88 = 662,488.88/x
3. Step 3: Cross multiply
   309,065.63x = 662,488.88 × 662,488.88
4. Step 4: Simplify right side
   309,065.63x = 438,891,509,498.77
5. Step 5: Solve for x
   x = 438,891,509,498.77/309,065.63
6. Step 6: Final answer
   x = 1,420,059.28