Finding the Third Proportional to 305,389.50 and 658,112

Step by Step Solution

1. Step 1: Write the proportion equation
   305,389.50 : 658,112 = 658,112 : x
2. Step 2: Convert to fraction form
   305,389.50/658,112 = 658,112/x
3. Step 3: Cross multiply
   305,389.50x = 658,112 × 658,112
4. Step 4: Simplify right side
   305,389.50x = 433,111,404,544
5. Step 5: Solve for x
   x = 433,111,404,544/305,389.50
6. Step 6: Final answer
   x = 1,418,226.25