Finding the Third Proportional to 19,431.50 and 42,945.50

Step by Step Solution

1. Step 1: Write the proportion equation
   19,431.50 : 42,945.50 = 42,945.50 : x
2. Step 2: Convert to fraction form
   19,431.50/42,945.50 = 42,945.50/x
3. Step 3: Cross multiply
   19,431.50x = 42,945.50 × 42,945.50
4. Step 4: Simplify right side
   19,431.50x = 1,844,315,970.25
5. Step 5: Solve for x
   x = 1,844,315,970.25/19,431.50
6. Step 6: Final answer
   x = 94,913.72