Finding the Fourth Proportional to 21,804.76, 30,090.88 and 12,246.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,804.76 : 30,090.88 = 12,246.72 : x
2. Step 2: Convert to fraction form
   21,804.76/30,090.88 = 12,246.72/x
3. Step 3: Cross multiply
   21,804.76x = 30,090.88 × 12,246.72
4. Step 4: Simplify right side
   21,804.76x = 368,514,581.91
5. Step 5: Solve for x
   x = 368,514,581.91/21,804.76
6. Step 6: Final answer
   x = 16,900.65