Finding the Third Proportional to 13,779.75 and 20,630.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,779.75 : 20,630.50 = 20,630.50 : x
2. Step 2: Convert to fraction form
   13,779.75/20,630.50 = 20,630.50/x
3. Step 3: Cross multiply
   13,779.75x = 20,630.50 × 20,630.50
4. Step 4: Simplify right side
   13,779.75x = 425,617,530.25
5. Step 5: Solve for x
   x = 425,617,530.25/13,779.75
6. Step 6: Final answer
   x = 30,887.17