Finding the Third Proportional to 9,218.81 and 19,753.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,218.81 : 19,753.88 = 19,753.88 : x
2. Step 2: Convert to fraction form
   9,218.81/19,753.88 = 19,753.88/x
3. Step 3: Cross multiply
   9,218.81x = 19,753.88 × 19,753.88
4. Step 4: Simplify right side
   9,218.81x = 390,215,577.52
5. Step 5: Solve for x
   x = 390,215,577.52/9,218.81
6. Step 6: Final answer
   x = 42,328.18