Finding the Third Proportional to 389,130 and 838,300

Step by Step Solution

1. Step 1: Write the proportion equation
   389,130 : 838,300 = 838,300 : x
2. Step 2: Convert to fraction form
   389,130/838,300 = 838,300/x
3. Step 3: Cross multiply
   389,130x = 838,300 × 838,300
4. Step 4: Simplify right side
   389,130x = 702,746,890,000
5. Step 5: Solve for x
   x = 702,746,890,000/389,130
6. Step 6: Final answer
   x = 1,805,943.75