Finding the Third Proportional to 11,751.75 and 20,911.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,751.75 : 20,911.50 = 20,911.50 : x
2. Step 2: Convert to fraction form
   11,751.75/20,911.50 = 20,911.50/x
3. Step 3: Cross multiply
   11,751.75x = 20,911.50 × 20,911.50
4. Step 4: Simplify right side
   11,751.75x = 437,290,832.25
5. Step 5: Solve for x
   x = 437,290,832.25/11,751.75
6. Step 6: Final answer
   x = 37,210.70