Finding the Third Proportional to 13,015,071,078 and 18,328,088,071.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,015,071,078 : 18,328,088,071.50 = 18,328,088,071.50 : x
2. Step 2: Convert to fraction form
   13,015,071,078/18,328,088,071.50 = 18,328,088,071.50/x
3. Step 3: Cross multiply
   13,015,071,078x = 18,328,088,071.50 × 18,328,088,071.50
4. Step 4: Simplify right side
   13,015,071,078x = 335,918,812,356,660,559,872
5. Step 5: Solve for x
   x = 335,918,812,356,660,559,872/13,015,071,078
6. Step 6: Final answer
   x = 25,809,986,771.76