Finding the Third Proportional to 3,321,990 and 5,129,964

Step by Step Solution

1. Step 1: Write the proportion equation
   3,321,990 : 5,129,964 = 5,129,964 : x
2. Step 2: Convert to fraction form
   3,321,990/5,129,964 = 5,129,964/x
3. Step 3: Cross multiply
   3,321,990x = 5,129,964 × 5,129,964
4. Step 4: Simplify right side
   3,321,990x = 26,316,530,641,296
5. Step 5: Solve for x
   x = 26,316,530,641,296/3,321,990
6. Step 6: Final answer
   x = 7,921,917.48