Finding the Fourth Proportional to 10,128.39, 13,976.60 and 5,651.79

Step by Step Solution

1. Step 1: Write the proportion equation
   10,128.39 : 13,976.60 = 5,651.79 : x
2. Step 2: Convert to fraction form
   10,128.39/13,976.60 = 5,651.79/x
3. Step 3: Cross multiply
   10,128.39x = 13,976.60 × 5,651.79
4. Step 4: Simplify right side
   10,128.39x = 78,992,779.86
5. Step 5: Solve for x
   x = 78,992,779.86/10,128.39
6. Step 6: Final answer
   x = 7,799.14