Finding the Fourth Proportional to 10,517.51, 15,779.34 and 3,944.21

Step by Step Solution

1. Step 1: Write the proportion equation
   10,517.51 : 15,779.34 = 3,944.21 : x
2. Step 2: Convert to fraction form
   10,517.51/15,779.34 = 3,944.21/x
3. Step 3: Cross multiply
   10,517.51x = 15,779.34 × 3,944.21
4. Step 4: Simplify right side
   10,517.51x = 62,236,951.72
5. Step 5: Solve for x
   x = 62,236,951.72/10,517.51
6. Step 6: Final answer
   x = 5,917.46