Finding the Fourth Proportional to 15,500.41, 21,390.69 and 8,426.82

Step by Step Solution

1. Step 1: Write the proportion equation
   15,500.41 : 21,390.69 = 8,426.82 : x
2. Step 2: Convert to fraction form
   15,500.41/21,390.69 = 8,426.82/x
3. Step 3: Cross multiply
   15,500.41x = 21,390.69 × 8,426.82
4. Step 4: Simplify right side
   15,500.41x = 180,255,494.31
5. Step 5: Solve for x
   x = 180,255,494.31/15,500.41
6. Step 6: Final answer
   x = 11,629.08