Finding the Third Proportional to 13,980.38 and 20,779.88

Step by Step Solution

1. Step 1: Write the proportion equation
   13,980.38 : 20,779.88 = 20,779.88 : x
2. Step 2: Convert to fraction form
   13,980.38/20,779.88 = 20,779.88/x
3. Step 3: Cross multiply
   13,980.38x = 20,779.88 × 20,779.88
4. Step 4: Simplify right side
   13,980.38x = 431,803,205.02
5. Step 5: Solve for x
   x = 431,803,205.02/13,980.38
6. Step 6: Final answer
   x = 30,886.38