Finding the Third Proportional to 19,453.50 and 42,688.50

Step by Step Solution

1. Step 1: Write the proportion equation
   19,453.50 : 42,688.50 = 42,688.50 : x
2. Step 2: Convert to fraction form
   19,453.50/42,688.50 = 42,688.50/x
3. Step 3: Cross multiply
   19,453.50x = 42,688.50 × 42,688.50
4. Step 4: Simplify right side
   19,453.50x = 1,822,308,032.25
5. Step 5: Solve for x
   x = 1,822,308,032.25/19,453.50
6. Step 6: Final answer
   x = 93,675.07