Finding the Fourth Proportional to 9,918.32, 13,687.59 and 5,442.36

Step by Step Solution

1. Step 1: Write the proportion equation
   9,918.32 : 13,687.59 = 5,442.36 : x
2. Step 2: Convert to fraction form
   9,918.32/13,687.59 = 5,442.36/x
3. Step 3: Cross multiply
   9,918.32x = 13,687.59 × 5,442.36
4. Step 4: Simplify right side
   9,918.32x = 74,492,792.31
5. Step 5: Solve for x
   x = 74,492,792.31/9,918.32
6. Step 6: Final answer
   x = 7,510.63