Finding the Fourth Proportional to 19,620.59, 27,080.72 and 12,906.88

Step by Step Solution

1. Step 1: Write the proportion equation
   19,620.59 : 27,080.72 = 12,906.88 : x
2. Step 2: Convert to fraction form
   19,620.59/27,080.72 = 12,906.88/x
3. Step 3: Cross multiply
   19,620.59x = 27,080.72 × 12,906.88
4. Step 4: Simplify right side
   19,620.59x = 349,527,603.35
5. Step 5: Solve for x
   x = 349,527,603.35/19,620.59
6. Step 6: Final answer
   x = 17,814.33