Finding the Third Proportional to 342,076.50 and 728,442

Step by Step Solution

1. Step 1: Write the proportion equation
   342,076.50 : 728,442 = 728,442 : x
2. Step 2: Convert to fraction form
   342,076.50/728,442 = 728,442/x
3. Step 3: Cross multiply
   342,076.50x = 728,442 × 728,442
4. Step 4: Simplify right side
   342,076.50x = 530,627,747,364
5. Step 5: Solve for x
   x = 530,627,747,364/342,076.50
6. Step 6: Final answer
   x = 1,551,196.14