Finding the Third Proportional to 21,191.48 and 28,779.89

Step by Step Solution

1. Step 1: Write the proportion equation
   21,191.48 : 28,779.89 = 28,779.89 : x
2. Step 2: Convert to fraction form
   21,191.48/28,779.89 = 28,779.89/x
3. Step 3: Cross multiply
   21,191.48x = 28,779.89 × 28,779.89
4. Step 4: Simplify right side
   21,191.48x = 828,282,104.39
5. Step 5: Solve for x
   x = 828,282,104.39/21,191.48
6. Step 6: Final answer
   x = 39,085.61