Finding the Third Proportional to 45,495 and 99,990

Step by Step Solution

1. Step 1: Write the proportion equation
   45,495 : 99,990 = 99,990 : x
2. Step 2: Convert to fraction form
   45,495/99,990 = 99,990/x
3. Step 3: Cross multiply
   45,495x = 99,990 × 99,990
4. Step 4: Simplify right side
   45,495x = 9,998,000,100
5. Step 5: Solve for x
   x = 9,998,000,100/45,495
6. Step 6: Final answer
   x = 219,760.42