Finding the Third Proportional to 345,211.50 and 714,387

Step by Step Solution

1. Step 1: Write the proportion equation
   345,211.50 : 714,387 = 714,387 : x
2. Step 2: Convert to fraction form
   345,211.50/714,387 = 714,387/x
3. Step 3: Cross multiply
   345,211.50x = 714,387 × 714,387
4. Step 4: Simplify right side
   345,211.50x = 510,348,785,769
5. Step 5: Solve for x
   x = 510,348,785,769/345,211.50
6. Step 6: Final answer
   x = 1,478,365.54