Finding the Third Proportional to 148,554 and 315,515.25

Step by Step Solution

1. Step 1: Write the proportion equation
   148,554 : 315,515.25 = 315,515.25 : x
2. Step 2: Convert to fraction form
   148,554/315,515.25 = 315,515.25/x
3. Step 3: Cross multiply
   148,554x = 315,515.25 × 315,515.25
4. Step 4: Simplify right side
   148,554x = 99,549,872,982.56
5. Step 5: Solve for x
   x = 99,549,872,982.56/148,554
6. Step 6: Final answer
   x = 670,125.83