Finding the Third Proportional to 13,811.13 and 20,716.70

Step by Step Solution

1. Step 1: Write the proportion equation
   13,811.13 : 20,716.70 = 20,716.70 : x
2. Step 2: Convert to fraction form
   13,811.13/20,716.70 = 20,716.70/x
3. Step 3: Cross multiply
   13,811.13x = 20,716.70 × 20,716.70
4. Step 4: Simplify right side
   13,811.13x = 429,181,626.52
5. Step 5: Solve for x
   x = 429,181,626.52/13,811.13
6. Step 6: Final answer
   x = 31,075.05