Finding the Third Proportional to 148,945.50 and 319,212

Step by Step Solution

1. Step 1: Write the proportion equation
   148,945.50 : 319,212 = 319,212 : x
2. Step 2: Convert to fraction form
   148,945.50/319,212 = 319,212/x
3. Step 3: Cross multiply
   148,945.50x = 319,212 × 319,212
4. Step 4: Simplify right side
   148,945.50x = 101,896,300,944
5. Step 5: Solve for x
   x = 101,896,300,944/148,945.50
6. Step 6: Final answer
   x = 684,118.02