Finding the Third Proportional to 13,911.50 and 30,488.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,911.50 : 30,488.50 = 30,488.50 : x
2. Step 2: Convert to fraction form
   13,911.50/30,488.50 = 30,488.50/x
3. Step 3: Cross multiply
   13,911.50x = 30,488.50 × 30,488.50
4. Step 4: Simplify right side
   13,911.50x = 929,548,632.25
5. Step 5: Solve for x
   x = 929,548,632.25/13,911.50
6. Step 6: Final answer
   x = 66,818.72