Finding the Fourth Proportional to 9,986.94, 13,781.89 and 5,510.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,986.94 : 13,781.89 = 5,510.88 : x
2. Step 2: Convert to fraction form
   9,986.94/13,781.89 = 5,510.88/x
3. Step 3: Cross multiply
   9,986.94x = 13,781.89 × 5,510.88
4. Step 4: Simplify right side
   9,986.94x = 75,950,341.96
5. Step 5: Solve for x
   x = 75,950,341.96/9,986.94
6. Step 6: Final answer
   x = 7,604.97