Finding the Third Proportional to 1,186,398 and 2,559,420

Step by Step Solution

1. Step 1: Write the proportion equation
   1,186,398 : 2,559,420 = 2,559,420 : x
2. Step 2: Convert to fraction form
   1,186,398/2,559,420 = 2,559,420/x
3. Step 3: Cross multiply
   1,186,398x = 2,559,420 × 2,559,420
4. Step 4: Simplify right side
   1,186,398x = 6,550,630,736,400
5. Step 5: Solve for x
   x = 6,550,630,736,400/1,186,398
6. Step 6: Final answer
   x = 5,521,444.52