Finding the Third Proportional to 488,970 and 778,045.50

Step by Step Solution

1. Step 1: Write the proportion equation
   488,970 : 778,045.50 = 778,045.50 : x
2. Step 2: Convert to fraction form
   488,970/778,045.50 = 778,045.50/x
3. Step 3: Cross multiply
   488,970x = 778,045.50 × 778,045.50
4. Step 4: Simplify right side
   488,970x = 605,354,800,070.25
5. Step 5: Solve for x
   x = 605,354,800,070.25/488,970
6. Step 6: Final answer
   x = 1,238,020.33