Finding the Third Proportional to 100,978.73 and 149,518.41

Step by Step Solution

1. Step 1: Write the proportion equation
   100,978.73 : 149,518.41 = 149,518.41 : x
2. Step 2: Convert to fraction form
   100,978.73/149,518.41 = 149,518.41/x
3. Step 3: Cross multiply
   100,978.73x = 149,518.41 × 149,518.41
4. Step 4: Simplify right side
   100,978.73x = 22,355,753,807.54
5. Step 5: Solve for x
   x = 22,355,753,807.54/100,978.73
6. Step 6: Final answer
   x = 221,390.71