Finding the Third Proportional to 11,772.21 and 20,930.27

Step by Step Solution

1. Step 1: Write the proportion equation
   11,772.21 : 20,930.27 = 20,930.27 : x
2. Step 2: Convert to fraction form
   11,772.21/20,930.27 = 20,930.27/x
3. Step 3: Cross multiply
   11,772.21x = 20,930.27 × 20,930.27
4. Step 4: Simplify right side
   11,772.21x = 438,076,346.17
5. Step 5: Solve for x
   x = 438,076,346.17/11,772.21
6. Step 6: Final answer
   x = 37,212.75