Finding the Third Proportional to 9,077.50 and 19,689.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,077.50 : 19,689.50 = 19,689.50 : x
2. Step 2: Convert to fraction form
   9,077.50/19,689.50 = 19,689.50/x
3. Step 3: Cross multiply
   9,077.50x = 19,689.50 × 19,689.50
4. Step 4: Simplify right side
   9,077.50x = 387,676,410.25
5. Step 5: Solve for x
   x = 387,676,410.25/9,077.50
6. Step 6: Final answer
   x = 42,707.40