Finding the Third Proportional to 380,902.50 and 812,430

Step by Step Solution

1. Step 1: Write the proportion equation
   380,902.50 : 812,430 = 812,430 : x
2. Step 2: Convert to fraction form
   380,902.50/812,430 = 812,430/x
3. Step 3: Cross multiply
   380,902.50x = 812,430 × 812,430
4. Step 4: Simplify right side
   380,902.50x = 660,042,504,900
5. Step 5: Solve for x
   x = 660,042,504,900/380,902.50
6. Step 6: Final answer
   x = 1,732,838.47