Finding the Third Proportional to 305,878.50 and 656,064

Step by Step Solution

1. Step 1: Write the proportion equation
   305,878.50 : 656,064 = 656,064 : x
2. Step 2: Convert to fraction form
   305,878.50/656,064 = 656,064/x
3. Step 3: Cross multiply
   305,878.50x = 656,064 × 656,064
4. Step 4: Simplify right side
   305,878.50x = 430,419,972,096
5. Step 5: Solve for x
   x = 430,419,972,096/305,878.50
6. Step 6: Final answer
   x = 1,407,159.94