Finding the Third Proportional to 3,686,690 and 5,642,300

Step by Step Solution

1. Step 1: Write the proportion equation
   3,686,690 : 5,642,300 = 5,642,300 : x
2. Step 2: Convert to fraction form
   3,686,690/5,642,300 = 5,642,300/x
3. Step 3: Cross multiply
   3,686,690x = 5,642,300 × 5,642,300
4. Step 4: Simplify right side
   3,686,690x = 31,835,549,290,000
5. Step 5: Solve for x
   x = 31,835,549,290,000/3,686,690
6. Step 6: Final answer
   x = 8,635,266.13