Finding the Third Proportional to 13,199,804 and 21,003,690

Step by Step Solution

1. Step 1: Write the proportion equation
   13,199,804 : 21,003,690 = 21,003,690 : x
2. Step 2: Convert to fraction form
   13,199,804/21,003,690 = 21,003,690/x
3. Step 3: Cross multiply
   13,199,804x = 21,003,690 × 21,003,690
4. Step 4: Simplify right side
   13,199,804x = 441,154,993,616,100
5. Step 5: Solve for x
   x = 441,154,993,616,100/13,199,804
6. Step 6: Final answer
   x = 33,421,329.11