Finding the Third Proportional to 342,261 and 728,856

Step by Step Solution

1. Step 1: Write the proportion equation
   342,261 : 728,856 = 728,856 : x
2. Step 2: Convert to fraction form
   342,261/728,856 = 728,856/x
3. Step 3: Cross multiply
   342,261x = 728,856 × 728,856
4. Step 4: Simplify right side
   342,261x = 531,231,068,736
5. Step 5: Solve for x
   x = 531,231,068,736/342,261
6. Step 6: Final answer
   x = 1,552,122.70