Finding the Fourth Proportional to 9,918.48, 13,687.89 and 5,442.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,918.48 : 13,687.89 = 5,442.42 : x
2. Step 2: Convert to fraction form
   9,918.48/13,687.89 = 5,442.42/x
3. Step 3: Cross multiply
   9,918.48x = 13,687.89 × 5,442.42
4. Step 4: Simplify right side
   9,918.48x = 74,495,246.29
5. Step 5: Solve for x
   x = 74,495,246.29/9,918.48
6. Step 6: Final answer
   x = 7,510.75