Finding the Fourth Proportional to 21,097.41, 31,610.55 and 12,751.98

Step by Step Solution

1. Step 1: Write the proportion equation
   21,097.41 : 31,610.55 = 12,751.98 : x
2. Step 2: Convert to fraction form
   21,097.41/31,610.55 = 12,751.98/x
3. Step 3: Cross multiply
   21,097.41x = 31,610.55 × 12,751.98
4. Step 4: Simplify right side
   21,097.41x = 403,097,101.39
5. Step 5: Solve for x
   x = 403,097,101.39/21,097.41
6. Step 6: Final answer
   x = 19,106.47