Finding the Third Proportional to 5,128,802 and 8,121,333

Step by Step Solution

1. Step 1: Write the proportion equation
   5,128,802 : 8,121,333 = 8,121,333 : x
2. Step 2: Convert to fraction form
   5,128,802/8,121,333 = 8,121,333/x
3. Step 3: Cross multiply
   5,128,802x = 8,121,333 × 8,121,333
4. Step 4: Simplify right side
   5,128,802x = 65,956,049,696,889
5. Step 5: Solve for x
   x = 65,956,049,696,889/5,128,802
6. Step 6: Final answer
   x = 12,859,932.92