Finding the Fourth Proportional to 19,691.02, 27,158.25 and 12,618.10

Step by Step Solution

1. Step 1: Write the proportion equation
   19,691.02 : 27,158.25 = 12,618.10 : x
2. Step 2: Convert to fraction form
   19,691.02/27,158.25 = 12,618.10/x
3. Step 3: Cross multiply
   19,691.02x = 27,158.25 × 12,618.10
4. Step 4: Simplify right side
   19,691.02x = 342,685,514.33
5. Step 5: Solve for x
   x = 342,685,514.33/19,691.02
6. Step 6: Final answer
   x = 17,403.14