Finding the Third Proportional to 11,818,578 and 25,402,686

Step by Step Solution

1. Step 1: Write the proportion equation
   11,818,578 : 25,402,686 = 25,402,686 : x
2. Step 2: Convert to fraction form
   11,818,578/25,402,686 = 25,402,686/x
3. Step 3: Cross multiply
   11,818,578x = 25,402,686 × 25,402,686
4. Step 4: Simplify right side
   11,818,578x = 645,296,456,014,596
5. Step 5: Solve for x
   x = 645,296,456,014,596/11,818,578
6. Step 6: Final answer
   x = 54,600,177.45