Finding the Third Proportional to 6,404,072 and 9,905,364

Step by Step Solution

1. Step 1: Write the proportion equation
   6,404,072 : 9,905,364 = 9,905,364 : x
2. Step 2: Convert to fraction form
   6,404,072/9,905,364 = 9,905,364/x
3. Step 3: Cross multiply
   6,404,072x = 9,905,364 × 9,905,364
4. Step 4: Simplify right side
   6,404,072x = 98,116,235,972,496
5. Step 5: Solve for x
   x = 98,116,235,972,496/6,404,072
6. Step 6: Final answer
   x = 15,320,913.94