Finding the Fourth Proportional to 9,918.70, 13,687.73 and 5,442.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,918.70 : 13,687.73 = 5,442.42 : x
2. Step 2: Convert to fraction form
   9,918.70/13,687.73 = 5,442.42/x
3. Step 3: Cross multiply
   9,918.70x = 13,687.73 × 5,442.42
4. Step 4: Simplify right side
   9,918.70x = 74,494,375.51
5. Step 5: Solve for x
   x = 74,494,375.51/9,918.70
6. Step 6: Final answer
   x = 7,510.50