Finding the Third Proportional to 353,940 and 770,090

Step by Step Solution

1. Step 1: Write the proportion equation
   353,940 : 770,090 = 770,090 : x
2. Step 2: Convert to fraction form
   353,940/770,090 = 770,090/x
3. Step 3: Cross multiply
   353,940x = 770,090 × 770,090
4. Step 4: Simplify right side
   353,940x = 593,038,608,100
5. Step 5: Solve for x
   x = 593,038,608,100/353,940
6. Step 6: Final answer
   x = 1,675,534.29