Finding the Fourth Proportional to 10,665.85, 14,721.78 and 6,188.70

Step by Step Solution

1. Step 1: Write the proportion equation
   10,665.85 : 14,721.78 = 6,188.70 : x
2. Step 2: Convert to fraction form
   10,665.85/14,721.78 = 6,188.70/x
3. Step 3: Cross multiply
   10,665.85x = 14,721.78 × 6,188.70
4. Step 4: Simplify right side
   10,665.85x = 91,108,679.89
5. Step 5: Solve for x
   x = 91,108,679.89/10,665.85
6. Step 6: Final answer
   x = 8,542.09