Finding the Third Proportional to 20,898.63 and 45,128.39

Step by Step Solution

1. Step 1: Write the proportion equation
   20,898.63 : 45,128.39 = 45,128.39 : x
2. Step 2: Convert to fraction form
   20,898.63/45,128.39 = 45,128.39/x
3. Step 3: Cross multiply
   20,898.63x = 45,128.39 × 45,128.39
4. Step 4: Simplify right side
   20,898.63x = 2,036,571,640.40
5. Step 5: Solve for x
   x = 2,036,571,640.40/20,898.63
6. Step 6: Final answer
   x = 97,449.99