Finding the Third Proportional to 1,515,149,142 and 3,540,072,059

Step by Step Solution

1. Step 1: Write the proportion equation
   1,515,149,142 : 3,540,072,059 = 3,540,072,059 : x
2. Step 2: Convert to fraction form
   1,515,149,142/3,540,072,059 = 3,540,072,059/x
3. Step 3: Cross multiply
   1,515,149,142x = 3,540,072,059 × 3,540,072,059
4. Step 4: Simplify right side
   1,515,149,142x = 12,532,110,182,912,499,712
5. Step 5: Solve for x
   x = 12,532,110,182,912,499,712/1,515,149,142
6. Step 6: Final answer
   x = 8,271,205,675.75