Finding the Third Proportional to 78,815.25 and 175,124.25

Step by Step Solution

1. Step 1: Write the proportion equation
   78,815.25 : 175,124.25 = 175,124.25 : x
2. Step 2: Convert to fraction form
   78,815.25/175,124.25 = 175,124.25/x
3. Step 3: Cross multiply
   78,815.25x = 175,124.25 × 175,124.25
4. Step 4: Simplify right side
   78,815.25x = 30,668,502,938.06
5. Step 5: Solve for x
   x = 30,668,502,938.06/78,815.25
6. Step 6: Final answer
   x = 389,118.89