Finding the Third Proportional to 61,978.50 and 81,849

Step by Step Solution

1. Step 1: Write the proportion equation
   61,978.50 : 81,849 = 81,849 : x
2. Step 2: Convert to fraction form
   61,978.50/81,849 = 81,849/x
3. Step 3: Cross multiply
   61,978.50x = 81,849 × 81,849
4. Step 4: Simplify right side
   61,978.50x = 6,699,258,801
5. Step 5: Solve for x
   x = 6,699,258,801/61,978.50
6. Step 6: Final answer
   x = 108,090.04