Finding the Third Proportional to 13,215.87 and 27,729.11

Step by Step Solution

1. Step 1: Write the proportion equation
   13,215.87 : 27,729.11 = 27,729.11 : x
2. Step 2: Convert to fraction form
   13,215.87/27,729.11 = 27,729.11/x
3. Step 3: Cross multiply
   13,215.87x = 27,729.11 × 27,729.11
4. Step 4: Simplify right side
   13,215.87x = 768,903,290.10
5. Step 5: Solve for x
   x = 768,903,290.10/13,215.87
6. Step 6: Final answer
   x = 58,180.31