Finding the Fourth Proportional to 12,866.72, 19,309.29 and 5,476.37

Step by Step Solution

1. Step 1: Write the proportion equation
   12,866.72 : 19,309.29 = 5,476.37 : x
2. Step 2: Convert to fraction form
   12,866.72/19,309.29 = 5,476.37/x
3. Step 3: Cross multiply
   12,866.72x = 19,309.29 × 5,476.37
4. Step 4: Simplify right side
   12,866.72x = 105,744,719.93
5. Step 5: Solve for x
   x = 105,744,719.93/12,866.72
6. Step 6: Final answer
   x = 8,218.47