Finding the Third Proportional to 1,217,388 and 1,899,780

Step by Step Solution

1. Step 1: Write the proportion equation
   1,217,388 : 1,899,780 = 1,899,780 : x
2. Step 2: Convert to fraction form
   1,217,388/1,899,780 = 1,899,780/x
3. Step 3: Cross multiply
   1,217,388x = 1,899,780 × 1,899,780
4. Step 4: Simplify right side
   1,217,388x = 3,609,164,048,400
5. Step 5: Solve for x
   x = 3,609,164,048,400/1,217,388
6. Step 6: Final answer
   x = 2,964,678.52