Finding the Third Proportional to 342,479.50 and 545,429.50

Step by Step Solution

1. Step 1: Write the proportion equation
   342,479.50 : 545,429.50 = 545,429.50 : x
2. Step 2: Convert to fraction form
   342,479.50/545,429.50 = 545,429.50/x
3. Step 3: Cross multiply
   342,479.50x = 545,429.50 × 545,429.50
4. Step 4: Simplify right side
   342,479.50x = 297,493,339,470.25
5. Step 5: Solve for x
   x = 297,493,339,470.25/342,479.50
6. Step 6: Final answer
   x = 868,645.68