Finding the Third Proportional to 345,064 and 754,280

Step by Step Solution

1. Step 1: Write the proportion equation
   345,064 : 754,280 = 754,280 : x
2. Step 2: Convert to fraction form
   345,064/754,280 = 754,280/x
3. Step 3: Cross multiply
   345,064x = 754,280 × 754,280
4. Step 4: Simplify right side
   345,064x = 568,938,318,400
5. Step 5: Solve for x
   x = 568,938,318,400/345,064
6. Step 6: Final answer
   x = 1,648,790.71