Finding the Third Proportional to 37,578,816 and 72,171,648

Step by Step Solution

1. Step 1: Write the proportion equation
   37,578,816 : 72,171,648 = 72,171,648 : x
2. Step 2: Convert to fraction form
   37,578,816/72,171,648 = 72,171,648/x
3. Step 3: Cross multiply
   37,578,816x = 72,171,648 × 72,171,648
4. Step 4: Simplify right side
   37,578,816x = 5,208,746,775,035,904
5. Step 5: Solve for x
   x = 5,208,746,775,035,904/37,578,816
6. Step 6: Final answer
   x = 138,608,592.01