Finding the Third Proportional to 11,777.91 and 28,556.30

Step by Step Solution

1. Step 1: Write the proportion equation
   11,777.91 : 28,556.30 = 28,556.30 : x
2. Step 2: Convert to fraction form
   11,777.91/28,556.30 = 28,556.30/x
3. Step 3: Cross multiply
   11,777.91x = 28,556.30 × 28,556.30
4. Step 4: Simplify right side
   11,777.91x = 815,462,091.21
5. Step 5: Solve for x
   x = 815,462,091.21/11,777.91
6. Step 6: Final answer
   x = 69,236.59