Finding the Third Proportional to 18,488.25 and 42,603.75

Step by Step Solution

1. Step 1: Write the proportion equation
   18,488.25 : 42,603.75 = 42,603.75 : x
2. Step 2: Convert to fraction form
   18,488.25/42,603.75 = 42,603.75/x
3. Step 3: Cross multiply
   18,488.25x = 42,603.75 × 42,603.75
4. Step 4: Simplify right side
   18,488.25x = 1,815,079,514.06
5. Step 5: Solve for x
   x = 1,815,079,514.06/18,488.25
6. Step 6: Final answer
   x = 98,174.76