Finding the Fourth Proportional to 9,918.91, 13,687.86 and 5,442.62

Step by Step Solution

1. Step 1: Write the proportion equation
   9,918.91 : 13,687.86 = 5,442.62 : x
2. Step 2: Convert to fraction form
   9,918.91/13,687.86 = 5,442.62/x
3. Step 3: Cross multiply
   9,918.91x = 13,687.86 × 5,442.62
4. Step 4: Simplify right side
   9,918.91x = 74,497,820.59
5. Step 5: Solve for x
   x = 74,497,820.59/9,918.91
6. Step 6: Final answer
   x = 7,510.69