Finding the Third Proportional to 78,818.50 and 175,131

Step by Step Solution

1. Step 1: Write the proportion equation
   78,818.50 : 175,131 = 175,131 : x
2. Step 2: Convert to fraction form
   78,818.50/175,131 = 175,131/x
3. Step 3: Cross multiply
   78,818.50x = 175,131 × 175,131
4. Step 4: Simplify right side
   78,818.50x = 30,670,867,161
5. Step 5: Solve for x
   x = 30,670,867,161/78,818.50
6. Step 6: Final answer
   x = 389,132.85