Finding the Fourth Proportional to 19,650.79, 27,071.98 and 13,672.18

Step by Step Solution

1. Step 1: Write the proportion equation
   19,650.79 : 27,071.98 = 13,672.18 : x
2. Step 2: Convert to fraction form
   19,650.79/27,071.98 = 13,672.18/x
3. Step 3: Cross multiply
   19,650.79x = 27,071.98 × 13,672.18
4. Step 4: Simplify right side
   19,650.79x = 370,132,983.52
5. Step 5: Solve for x
   x = 370,132,983.52/19,650.79
6. Step 6: Final answer
   x = 18,835.53