Finding the Third Proportional to 345,210 and 738,397.50

Step by Step Solution

1. Step 1: Write the proportion equation
   345,210 : 738,397.50 = 738,397.50 : x
2. Step 2: Convert to fraction form
   345,210/738,397.50 = 738,397.50/x
3. Step 3: Cross multiply
   345,210x = 738,397.50 × 738,397.50
4. Step 4: Simplify right side
   345,210x = 545,230,868,006.25
5. Step 5: Solve for x
   x = 545,230,868,006.25/345,210
6. Step 6: Final answer
   x = 1,579,417.94