Finding the Third Proportional to 6,388,860 and 13,855,680

Step by Step Solution

1. Step 1: Write the proportion equation
   6,388,860 : 13,855,680 = 13,855,680 : x
2. Step 2: Convert to fraction form
   6,388,860/13,855,680 = 13,855,680/x
3. Step 3: Cross multiply
   6,388,860x = 13,855,680 × 13,855,680
4. Step 4: Simplify right side
   6,388,860x = 191,979,868,262,400
5. Step 5: Solve for x
   x = 191,979,868,262,400/6,388,860
6. Step 6: Final answer
   x = 30,049,158.73