Finding the Third Proportional to 9,754.17 and 19,990.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,754.17 : 19,990.55 = 19,990.55 : x
2. Step 2: Convert to fraction form
   9,754.17/19,990.55 = 19,990.55/x
3. Step 3: Cross multiply
   9,754.17x = 19,990.55 × 19,990.55
4. Step 4: Simplify right side
   9,754.17x = 399,621,964.36
5. Step 5: Solve for x
   x = 399,621,964.36/9,754.17
6. Step 6: Final answer
   x = 40,969.34