Finding the Third Proportional to 148,300.50 and 319,929.50

Step by Step Solution

1. Step 1: Write the proportion equation
   148,300.50 : 319,929.50 = 319,929.50 : x
2. Step 2: Convert to fraction form
   148,300.50/319,929.50 = 319,929.50/x
3. Step 3: Cross multiply
   148,300.50x = 319,929.50 × 319,929.50
4. Step 4: Simplify right side
   148,300.50x = 102,354,884,970.25
5. Step 5: Solve for x
   x = 102,354,884,970.25/148,300.50
6. Step 6: Final answer
   x = 690,185.70