Finding the Fourth Proportional to 21,779.26, 30,055.38 and 12,347.83

Step by Step Solution

1. Step 1: Write the proportion equation
   21,779.26 : 30,055.38 = 12,347.83 : x
2. Step 2: Convert to fraction form
   21,779.26/30,055.38 = 12,347.83/x
3. Step 3: Cross multiply
   21,779.26x = 30,055.38 × 12,347.83
4. Step 4: Simplify right side
   21,779.26x = 371,118,722.83
5. Step 5: Solve for x
   x = 371,118,722.83/21,779.26
6. Step 6: Final answer
   x = 17,040.01