Finding the Fourth Proportional to 15,779.90, 21,760.71 and 12,241.82

Step by Step Solution

1. Step 1: Write the proportion equation
   15,779.90 : 21,760.71 = 12,241.82 : x
2. Step 2: Convert to fraction form
   15,779.90/21,760.71 = 12,241.82/x
3. Step 3: Cross multiply
   15,779.90x = 21,760.71 × 12,241.82
4. Step 4: Simplify right side
   15,779.90x = 266,390,694.89
5. Step 5: Solve for x
   x = 266,390,694.89/15,779.90
6. Step 6: Final answer
   x = 16,881.65