Finding the Third Proportional to 7,658.30 and 18,118.69

Step by Step Solution

1. Step 1: Write the proportion equation
   7,658.30 : 18,118.69 = 18,118.69 : x
2. Step 2: Convert to fraction form
   7,658.30/18,118.69 = 18,118.69/x
3. Step 3: Cross multiply
   7,658.30x = 18,118.69 × 18,118.69
4. Step 4: Simplify right side
   7,658.30x = 328,286,836.72
5. Step 5: Solve for x
   x = 328,286,836.72/7,658.30
6. Step 6: Final answer
   x = 42,866.82