Finding the Third Proportional to 139,493.75 and 303,898.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,493.75 : 303,898.50 = 303,898.50 : x
2. Step 2: Convert to fraction form
   139,493.75/303,898.50 = 303,898.50/x
3. Step 3: Cross multiply
   139,493.75x = 303,898.50 × 303,898.50
4. Step 4: Simplify right side
   139,493.75x = 92,354,298,302.25
5. Step 5: Solve for x
   x = 92,354,298,302.25/139,493.75
6. Step 6: Final answer
   x = 662,067.64