Finding the Third Proportional to 154,792.75 and 316,145.25

Step by Step Solution

1. Step 1: Write the proportion equation
   154,792.75 : 316,145.25 = 316,145.25 : x
2. Step 2: Convert to fraction form
   154,792.75/316,145.25 = 316,145.25/x
3. Step 3: Cross multiply
   154,792.75x = 316,145.25 × 316,145.25
4. Step 4: Simplify right side
   154,792.75x = 99,947,819,097.56
5. Step 5: Solve for x
   x = 99,947,819,097.56/154,792.75
6. Step 6: Final answer
   x = 645,687.99