Finding the Third Proportional to 354,422 and 777,740.50

Step by Step Solution

1. Step 1: Write the proportion equation
   354,422 : 777,740.50 = 777,740.50 : x
2. Step 2: Convert to fraction form
   354,422/777,740.50 = 777,740.50/x
3. Step 3: Cross multiply
   354,422x = 777,740.50 × 777,740.50
4. Step 4: Simplify right side
   354,422x = 604,880,285,340.25
5. Step 5: Solve for x
   x = 604,880,285,340.25/354,422
6. Step 6: Final answer
   x = 1,706,666.87