Finding the Fourth Proportional to 9,918.54, 13,687.57 and 5,442.37

Step by Step Solution

1. Step 1: Write the proportion equation
   9,918.54 : 13,687.57 = 5,442.37 : x
2. Step 2: Convert to fraction form
   9,918.54/13,687.57 = 5,442.37/x
3. Step 3: Cross multiply
   9,918.54x = 13,687.57 × 5,442.37
4. Step 4: Simplify right side
   9,918.54x = 74,492,820.34
5. Step 5: Solve for x
   x = 74,492,820.34/9,918.54
6. Step 6: Final answer
   x = 7,510.46