Finding the Third Proportional to 19,929.75 and 42,289.50

Step by Step Solution

1. Step 1: Write the proportion equation
   19,929.75 : 42,289.50 = 42,289.50 : x
2. Step 2: Convert to fraction form
   19,929.75/42,289.50 = 42,289.50/x
3. Step 3: Cross multiply
   19,929.75x = 42,289.50 × 42,289.50
4. Step 4: Simplify right side
   19,929.75x = 1,788,401,810.25
5. Step 5: Solve for x
   x = 1,788,401,810.25/19,929.75
6. Step 6: Final answer
   x = 89,735.29