Finding the Fourth Proportional to 9,986.42, 13,781.34 and 5,510.34

Step by Step Solution

1. Step 1: Write the proportion equation
   9,986.42 : 13,781.34 = 5,510.34 : x
2. Step 2: Convert to fraction form
   9,986.42/13,781.34 = 5,510.34/x
3. Step 3: Cross multiply
   9,986.42x = 13,781.34 × 5,510.34
4. Step 4: Simplify right side
   9,986.42x = 75,939,848.39
5. Step 5: Solve for x
   x = 75,939,848.39/9,986.42
6. Step 6: Final answer
   x = 7,604.31