Finding the Third Proportional to 37,578,818 and 72,171,652

Step by Step Solution

1. Step 1: Write the proportion equation
   37,578,818 : 72,171,652 = 72,171,652 : x
2. Step 2: Convert to fraction form
   37,578,818/72,171,652 = 72,171,652/x
3. Step 3: Cross multiply
   37,578,818x = 72,171,652 × 72,171,652
4. Step 4: Simplify right side
   37,578,818x = 5,208,747,352,409,104
5. Step 5: Solve for x
   x = 5,208,747,352,409,104/37,578,818
6. Step 6: Final answer
   x = 138,608,599.99