Finding the Third Proportional to 155,977.50 and 319,344

Step by Step Solution

1. Step 1: Write the proportion equation
   155,977.50 : 319,344 = 319,344 : x
2. Step 2: Convert to fraction form
   155,977.50/319,344 = 319,344/x
3. Step 3: Cross multiply
   155,977.50x = 319,344 × 319,344
4. Step 4: Simplify right side
   155,977.50x = 101,980,590,336
5. Step 5: Solve for x
   x = 101,980,590,336/155,977.50
6. Step 6: Final answer
   x = 653,816.03