Finding the Third Proportional to 19,448.91 and 39,611.81

Step by Step Solution

1. Step 1: Write the proportion equation
   19,448.91 : 39,611.81 = 39,611.81 : x
2. Step 2: Convert to fraction form
   19,448.91/39,611.81 = 39,611.81/x
3. Step 3: Cross multiply
   19,448.91x = 39,611.81 × 39,611.81
4. Step 4: Simplify right side
   19,448.91x = 1,569,095,689.54
5. Step 5: Solve for x
   x = 1,569,095,689.54/19,448.91
6. Step 6: Final answer
   x = 80,677.84