Finding the Third Proportional to 16,265,484 and 21,684,888

Step by Step Solution

1. Step 1: Write the proportion equation
   16,265,484 : 21,684,888 = 21,684,888 : x
2. Step 2: Convert to fraction form
   16,265,484/21,684,888 = 21,684,888/x
3. Step 3: Cross multiply
   16,265,484x = 21,684,888 × 21,684,888
4. Step 4: Simplify right side
   16,265,484x = 470,234,367,572,544
5. Step 5: Solve for x
   x = 470,234,367,572,544/16,265,484
6. Step 6: Final answer
   x = 28,909,952.36