Finding the Third Proportional to 20,842.31 and 43,142.63

Step by Step Solution

1. Step 1: Write the proportion equation
   20,842.31 : 43,142.63 = 43,142.63 : x
2. Step 2: Convert to fraction form
   20,842.31/43,142.63 = 43,142.63/x
3. Step 3: Cross multiply
   20,842.31x = 43,142.63 × 43,142.63
4. Step 4: Simplify right side
   20,842.31x = 1,861,286,091.89
5. Step 5: Solve for x
   x = 1,861,286,091.89/20,842.31
6. Step 6: Final answer
   x = 89,303.24