Finding the Third Proportional to 45,408 and 98,990

Step by Step Solution

1. Step 1: Write the proportion equation
   45,408 : 98,990 = 98,990 : x
2. Step 2: Convert to fraction form
   45,408/98,990 = 98,990/x
3. Step 3: Cross multiply
   45,408x = 98,990 × 98,990
4. Step 4: Simplify right side
   45,408x = 9,799,020,100
5. Step 5: Solve for x
   x = 9,799,020,100/45,408
6. Step 6: Final answer
   x = 215,799.42