Finding the Third Proportional to 838,290 and 1,329,580

Step by Step Solution

1. Step 1: Write the proportion equation
   838,290 : 1,329,580 = 1,329,580 : x
2. Step 2: Convert to fraction form
   838,290/1,329,580 = 1,329,580/x
3. Step 3: Cross multiply
   838,290x = 1,329,580 × 1,329,580
4. Step 4: Simplify right side
   838,290x = 1,767,782,976,400
5. Step 5: Solve for x
   x = 1,767,782,976,400/838,290
6. Step 6: Final answer
   x = 2,108,796.45