Finding the Fourth Proportional to 19,908.51, 27,462.30 and 12,443.55

Step by Step Solution

1. Step 1: Write the proportion equation
   19,908.51 : 27,462.30 = 12,443.55 : x
2. Step 2: Convert to fraction form
   19,908.51/27,462.30 = 12,443.55/x
3. Step 3: Cross multiply
   19,908.51x = 27,462.30 × 12,443.55
4. Step 4: Simplify right side
   19,908.51x = 341,728,503.17
5. Step 5: Solve for x
   x = 341,728,503.17/19,908.51
6. Step 6: Final answer
   x = 17,164.95