Finding the Third Proportional to 353,970 and 770,139

Step by Step Solution

1. Step 1: Write the proportion equation
   353,970 : 770,139 = 770,139 : x
2. Step 2: Convert to fraction form
   353,970/770,139 = 770,139/x
3. Step 3: Cross multiply
   353,970x = 770,139 × 770,139
4. Step 4: Simplify right side
   353,970x = 593,114,079,321
5. Step 5: Solve for x
   x = 593,114,079,321/353,970
6. Step 6: Final answer
   x = 1,675,605.50