Finding the Fourth Proportional to 9,986.70, 13,781.41 and 5,510.46

Step by Step Solution

1. Step 1: Write the proportion equation
   9,986.70 : 13,781.41 = 5,510.46 : x
2. Step 2: Convert to fraction form
   9,986.70/13,781.41 = 5,510.46/x
3. Step 3: Cross multiply
   9,986.70x = 13,781.41 × 5,510.46
4. Step 4: Simplify right side
   9,986.70x = 75,941,908.55
5. Step 5: Solve for x
   x = 75,941,908.55/9,986.70
6. Step 6: Final answer
   x = 7,604.30