Finding the Third Proportional to 1,187,138 and 2,560,900

Step by Step Solution

1. Step 1: Write the proportion equation
   1,187,138 : 2,560,900 = 2,560,900 : x
2. Step 2: Convert to fraction form
   1,187,138/2,560,900 = 2,560,900/x
3. Step 3: Cross multiply
   1,187,138x = 2,560,900 × 2,560,900
4. Step 4: Simplify right side
   1,187,138x = 6,558,208,810,000
5. Step 5: Solve for x
   x = 6,558,208,810,000/1,187,138
6. Step 6: Final answer
   x = 5,524,386.22