Finding the Third Proportional to 245,115 and 346,855.50

Step by Step Solution

1. Step 1: Write the proportion equation
   245,115 : 346,855.50 = 346,855.50 : x
2. Step 2: Convert to fraction form
   245,115/346,855.50 = 346,855.50/x
3. Step 3: Cross multiply
   245,115x = 346,855.50 × 346,855.50
4. Step 4: Simplify right side
   245,115x = 120,308,737,880.25
5. Step 5: Solve for x
   x = 120,308,737,880.25/245,115
6. Step 6: Final answer
   x = 490,825.69