Finding the Third Proportional to 5,911,486 and 8,909,510

Step by Step Solution

1. Step 1: Write the proportion equation
   5,911,486 : 8,909,510 = 8,909,510 : x
2. Step 2: Convert to fraction form
   5,911,486/8,909,510 = 8,909,510/x
3. Step 3: Cross multiply
   5,911,486x = 8,909,510 × 8,909,510
4. Step 4: Simplify right side
   5,911,486x = 79,379,368,440,100
5. Step 5: Solve for x
   x = 79,379,368,440,100/5,911,486
6. Step 6: Final answer
   x = 13,427,988.91