Finding the Third Proportional to 342,123.75 and 728,514

Step by Step Solution

1. Step 1: Write the proportion equation
   342,123.75 : 728,514 = 728,514 : x
2. Step 2: Convert to fraction form
   342,123.75/728,514 = 728,514/x
3. Step 3: Cross multiply
   342,123.75x = 728,514 × 728,514
4. Step 4: Simplify right side
   342,123.75x = 530,732,648,196
5. Step 5: Solve for x
   x = 530,732,648,196/342,123.75
6. Step 6: Final answer
   x = 1,551,288.53