Finding the Third Proportional to 815,040 and 1,222,560

Step by Step Solution

1. Step 1: Write the proportion equation
   815,040 : 1,222,560 = 1,222,560 : x
2. Step 2: Convert to fraction form
   815,040/1,222,560 = 1,222,560/x
3. Step 3: Cross multiply
   815,040x = 1,222,560 × 1,222,560
4. Step 4: Simplify right side
   815,040x = 1,494,652,953,600
5. Step 5: Solve for x
   x = 1,494,652,953,600/815,040
6. Step 6: Final answer
   x = 1,833,840