Finding the Fourth Proportional to 19,714.04, 27,196.82 and 12,991.08

Step by Step Solution

1. Step 1: Write the proportion equation
   19,714.04 : 27,196.82 = 12,991.08 : x
2. Step 2: Convert to fraction form
   19,714.04/27,196.82 = 12,991.08/x
3. Step 3: Cross multiply
   19,714.04x = 27,196.82 × 12,991.08
4. Step 4: Simplify right side
   19,714.04x = 353,316,064.37
5. Step 5: Solve for x
   x = 353,316,064.37/19,714.04
6. Step 6: Final answer
   x = 17,922.05