Finding the Third Proportional to 245,838 and 336,442.50

Step by Step Solution

1. Step 1: Write the proportion equation
   245,838 : 336,442.50 = 336,442.50 : x
2. Step 2: Convert to fraction form
   245,838/336,442.50 = 336,442.50/x
3. Step 3: Cross multiply
   245,838x = 336,442.50 × 336,442.50
4. Step 4: Simplify right side
   245,838x = 113,193,555,806.25
5. Step 5: Solve for x
   x = 113,193,555,806.25/245,838
6. Step 6: Final answer
   x = 460,439.62