Finding the Third Proportional to 8,561,581,497 and 13,098,261,085.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,561,581,497 : 13,098,261,085.50 = 13,098,261,085.50 : x
2. Step 2: Convert to fraction form
   8,561,581,497/13,098,261,085.50 = 13,098,261,085.50/x
3. Step 3: Cross multiply
   8,561,581,497x = 13,098,261,085.50 × 13,098,261,085.50
4. Step 4: Simplify right side
   8,561,581,497x = 171,564,443,463,923,630,080
5. Step 5: Solve for x
   x = 171,564,443,463,923,630,080/8,561,581,497
6. Step 6: Final answer
   x = 20,038,872,902.63