Finding the Fourth Proportional to 6,866.23, 10,300.16 and 5,145.79

Step by Step Solution

1. Step 1: Write the proportion equation
   6,866.23 : 10,300.16 = 5,145.79 : x
2. Step 2: Convert to fraction form
   6,866.23/10,300.16 = 5,145.79/x
3. Step 3: Cross multiply
   6,866.23x = 10,300.16 × 5,145.79
4. Step 4: Simplify right side
   6,866.23x = 53,002,434.60
5. Step 5: Solve for x
   x = 53,002,434.60/6,866.23
6. Step 6: Final answer
   x = 7,719.29