Finding the Third Proportional to 5,590,510 and 11,978,300

Step by Step Solution

1. Step 1: Write the proportion equation
   5,590,510 : 11,978,300 = 11,978,300 : x
2. Step 2: Convert to fraction form
   5,590,510/11,978,300 = 11,978,300/x
3. Step 3: Cross multiply
   5,590,510x = 11,978,300 × 11,978,300
4. Step 4: Simplify right side
   5,590,510x = 143,479,670,890,000
5. Step 5: Solve for x
   x = 143,479,670,890,000/5,590,510
6. Step 6: Final answer
   x = 25,664,862.58