Finding the Fourth Proportional to 19,598.72, 27,027.52 and 12,890

Step by Step Solution

1. Step 1: Write the proportion equation
   19,598.72 : 27,027.52 = 12,890 : x
2. Step 2: Convert to fraction form
   19,598.72/27,027.52 = 12,890/x
3. Step 3: Cross multiply
   19,598.72x = 27,027.52 × 12,890
4. Step 4: Simplify right side
   19,598.72x = 348,384,732.80
5. Step 5: Solve for x
   x = 348,384,732.80/19,598.72
6. Step 6: Final answer
   x = 17,775.89