Finding the Third Proportional to 13,971.56 and 21,137.91

Step by Step Solution

1. Step 1: Write the proportion equation
   13,971.56 : 21,137.91 = 21,137.91 : x
2. Step 2: Convert to fraction form
   13,971.56/21,137.91 = 21,137.91/x
3. Step 3: Cross multiply
   13,971.56x = 21,137.91 × 21,137.91
4. Step 4: Simplify right side
   13,971.56x = 446,811,080.63
5. Step 5: Solve for x
   x = 446,811,080.63/13,971.56
6. Step 6: Final answer
   x = 31,980.04