Finding the Third Proportional to 620,709.50 and 1,333,280

Step by Step Solution

1. Step 1: Write the proportion equation
   620,709.50 : 1,333,280 = 1,333,280 : x
2. Step 2: Convert to fraction form
   620,709.50/1,333,280 = 1,333,280/x
3. Step 3: Cross multiply
   620,709.50x = 1,333,280 × 1,333,280
4. Step 4: Simplify right side
   620,709.50x = 1,777,635,558,400
5. Step 5: Solve for x
   x = 1,777,635,558,400/620,709.50
6. Step 6: Final answer
   x = 2,863,876.84