Finding the Fourth Proportional to 9,188.76, 12,684.78 and 5,410.71

Step by Step Solution

1. Step 1: Write the proportion equation
   9,188.76 : 12,684.78 = 5,410.71 : x
2. Step 2: Convert to fraction form
   9,188.76/12,684.78 = 5,410.71/x
3. Step 3: Cross multiply
   9,188.76x = 12,684.78 × 5,410.71
4. Step 4: Simplify right side
   9,188.76x = 68,633,665.99
5. Step 5: Solve for x
   x = 68,633,665.99/9,188.76
6. Step 6: Final answer
   x = 7,469.31