Finding the Third Proportional to 42,509.81 and 89,629.03

Step by Step Solution

1. Step 1: Write the proportion equation
   42,509.81 : 89,629.03 = 89,629.03 : x
2. Step 2: Convert to fraction form
   42,509.81/89,629.03 = 89,629.03/x
3. Step 3: Cross multiply
   42,509.81x = 89,629.03 × 89,629.03
4. Step 4: Simplify right side
   42,509.81x = 8,033,363,242.81
5. Step 5: Solve for x
   x = 8,033,363,242.81/42,509.81
6. Step 6: Final answer
   x = 188,976.68