Finding the Third Proportional to 5,585,580 and 8,540,820

Step by Step Solution

1. Step 1: Write the proportion equation
   5,585,580 : 8,540,820 = 8,540,820 : x
2. Step 2: Convert to fraction form
   5,585,580/8,540,820 = 8,540,820/x
3. Step 3: Cross multiply
   5,585,580x = 8,540,820 × 8,540,820
4. Step 4: Simplify right side
   5,585,580x = 72,945,606,272,400
5. Step 5: Solve for x
   x = 72,945,606,272,400/5,585,580
6. Step 6: Final answer
   x = 13,059,629.67