Finding the Third Proportional to 2,017,940 and 4,390,172

Step by Step Solution

1. Step 1: Write the proportion equation
   2,017,940 : 4,390,172 = 4,390,172 : x
2. Step 2: Convert to fraction form
   2,017,940/4,390,172 = 4,390,172/x
3. Step 3: Cross multiply
   2,017,940x = 4,390,172 × 4,390,172
4. Step 4: Simplify right side
   2,017,940x = 19,273,610,189,584
5. Step 5: Solve for x
   x = 19,273,610,189,584/2,017,940
6. Step 6: Final answer
   x = 9,551,131.45