Finding the Third Proportional to 148,470 and 320,250

Step by Step Solution

1. Step 1: Write the proportion equation
   148,470 : 320,250 = 320,250 : x
2. Step 2: Convert to fraction form
   148,470/320,250 = 320,250/x
3. Step 3: Cross multiply
   148,470x = 320,250 × 320,250
4. Step 4: Simplify right side
   148,470x = 102,560,062,500
5. Step 5: Solve for x
   x = 102,560,062,500/148,470
6. Step 6: Final answer
   x = 690,779.70