Finding the Third Proportional to 18,181,789,616 and 42,480,864,506

Step by Step Solution

1. Step 1: Write the proportion equation
   18,181,789,616 : 42,480,864,506 = 42,480,864,506 : x
2. Step 2: Convert to fraction form
   18,181,789,616/42,480,864,506 = 42,480,864,506/x
3. Step 3: Cross multiply
   18,181,789,616x = 42,480,864,506 × 42,480,864,506
4. Step 4: Simplify right side
   18,181,789,616x = 1,804,623,849,177,130,729,472
5. Step 5: Solve for x
   x = 1,804,623,849,177,130,729,472/18,181,789,616
6. Step 6: Final answer
   x = 99,254,467,645.42