Finding the Third Proportional to 148,990.50 and 317,185.88

Step by Step Solution

1. Step 1: Write the proportion equation
   148,990.50 : 317,185.88 = 317,185.88 : x
2. Step 2: Convert to fraction form
   148,990.50/317,185.88 = 317,185.88/x
3. Step 3: Cross multiply
   148,990.50x = 317,185.88 × 317,185.88
4. Step 4: Simplify right side
   148,990.50x = 100,606,879,299.52
5. Step 5: Solve for x
   x = 100,606,879,299.52/148,990.50
6. Step 6: Final answer
   x = 675,257.01