Finding the Third Proportional to 1,418,520 and 3,078,172

Step by Step Solution

1. Step 1: Write the proportion equation
   1,418,520 : 3,078,172 = 3,078,172 : x
2. Step 2: Convert to fraction form
   1,418,520/3,078,172 = 3,078,172/x
3. Step 3: Cross multiply
   1,418,520x = 3,078,172 × 3,078,172
4. Step 4: Simplify right side
   1,418,520x = 9,475,142,861,584
5. Step 5: Solve for x
   x = 9,475,142,861,584/1,418,520
6. Step 6: Final answer
   x = 6,679,597.65