Finding the Third Proportional to 21,242.25 and 43,405.88

Step by Step Solution

1. Step 1: Write the proportion equation
   21,242.25 : 43,405.88 = 43,405.88 : x
2. Step 2: Convert to fraction form
   21,242.25/43,405.88 = 43,405.88/x
3. Step 3: Cross multiply
   21,242.25x = 43,405.88 × 43,405.88
4. Step 4: Simplify right side
   21,242.25x = 1,884,069,984.52
5. Step 5: Solve for x
   x = 1,884,069,984.52/21,242.25
6. Step 6: Final answer
   x = 88,694.46