Finding the Third Proportional to 5,779.69 and 8,711.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,779.69 : 8,711.72 = 8,711.72 : x
2. Step 2: Convert to fraction form
   5,779.69/8,711.72 = 8,711.72/x
3. Step 3: Cross multiply
   5,779.69x = 8,711.72 × 8,711.72
4. Step 4: Simplify right side
   5,779.69x = 75,894,043.58
5. Step 5: Solve for x
   x = 75,894,043.58/5,779.69
6. Step 6: Final answer
   x = 13,131.17