Finding the Third Proportional to 19,309.50 and 42,309

Step by Step Solution

1. Step 1: Write the proportion equation
   19,309.50 : 42,309 = 42,309 : x
2. Step 2: Convert to fraction form
   19,309.50/42,309 = 42,309/x
3. Step 3: Cross multiply
   19,309.50x = 42,309 × 42,309
4. Step 4: Simplify right side
   19,309.50x = 1,790,051,481
5. Step 5: Solve for x
   x = 1,790,051,481/19,309.50
6. Step 6: Final answer
   x = 92,703.15