Finding the Third Proportional to 42,257.25 and 90,513

Step by Step Solution

1. Step 1: Write the proportion equation
   42,257.25 : 90,513 = 90,513 : x
2. Step 2: Convert to fraction form
   42,257.25/90,513 = 90,513/x
3. Step 3: Cross multiply
   42,257.25x = 90,513 × 90,513
4. Step 4: Simplify right side
   42,257.25x = 8,192,603,169
5. Step 5: Solve for x
   x = 8,192,603,169/42,257.25
6. Step 6: Final answer
   x = 193,874.50