Finding the Third Proportional to 19,855.50 and 42,590.25

Step by Step Solution

1. Step 1: Write the proportion equation
   19,855.50 : 42,590.25 = 42,590.25 : x
2. Step 2: Convert to fraction form
   19,855.50/42,590.25 = 42,590.25/x
3. Step 3: Cross multiply
   19,855.50x = 42,590.25 × 42,590.25
4. Step 4: Simplify right side
   19,855.50x = 1,813,929,395.06
5. Step 5: Solve for x
   x = 1,813,929,395.06/19,855.50
6. Step 6: Final answer
   x = 91,356.52