Finding the Third Proportional to 19,718.44 and 42,985.69

Step by Step Solution

1. Step 1: Write the proportion equation
   19,718.44 : 42,985.69 = 42,985.69 : x
2. Step 2: Convert to fraction form
   19,718.44/42,985.69 = 42,985.69/x
3. Step 3: Cross multiply
   19,718.44x = 42,985.69 × 42,985.69
4. Step 4: Simplify right side
   19,718.44x = 1,847,769,329.85
5. Step 5: Solve for x
   x = 1,847,769,329.85/19,718.44
6. Step 6: Final answer
   x = 93,707.70