Finding the Third Proportional to 7,077,287,799 and 10,988,838,513

Step by Step Solution

1. Step 1: Write the proportion equation
   7,077,287,799 : 10,988,838,513 = 10,988,838,513 : x
2. Step 2: Convert to fraction form
   7,077,287,799/10,988,838,513 = 10,988,838,513/x
3. Step 3: Cross multiply
   7,077,287,799x = 10,988,838,513 × 10,988,838,513
4. Step 4: Simplify right side
   7,077,287,799x = 120,754,571,864,792,055,808
5. Step 5: Solve for x
   x = 120,754,571,864,792,055,808/7,077,287,799
6. Step 6: Final answer
   x = 17,062,266,689.49