Finding the Third Proportional to 553,840 and 1,200,992

Step by Step Solution

1. Step 1: Write the proportion equation
   553,840 : 1,200,992 = 1,200,992 : x
2. Step 2: Convert to fraction form
   553,840/1,200,992 = 1,200,992/x
3. Step 3: Cross multiply
   553,840x = 1,200,992 × 1,200,992
4. Step 4: Simplify right side
   553,840x = 1,442,381,784,064
5. Step 5: Solve for x
   x = 1,442,381,784,064/553,840
6. Step 6: Final answer
   x = 2,604,329.38