Finding the Third Proportional to 4,830,522 and 9,870,780

Step by Step Solution

1. Step 1: Write the proportion equation
   4,830,522 : 9,870,780 = 9,870,780 : x
2. Step 2: Convert to fraction form
   4,830,522/9,870,780 = 9,870,780/x
3. Step 3: Cross multiply
   4,830,522x = 9,870,780 × 9,870,780
4. Step 4: Simplify right side
   4,830,522x = 97,432,297,808,400
5. Step 5: Solve for x
   x = 97,432,297,808,400/4,830,522
6. Step 6: Final answer
   x = 20,170,138.51