Finding the Third Proportional to 19,890 and 45,355.50

Step by Step Solution

1. Step 1: Write the proportion equation
   19,890 : 45,355.50 = 45,355.50 : x
2. Step 2: Convert to fraction form
   19,890/45,355.50 = 45,355.50/x
3. Step 3: Cross multiply
   19,890x = 45,355.50 × 45,355.50
4. Step 4: Simplify right side
   19,890x = 2,057,121,380.25
5. Step 5: Solve for x
   x = 2,057,121,380.25/19,890
6. Step 6: Final answer
   x = 103,424.91