Finding the Fourth Proportional to 9,915.81, 13,682.95 and 5,439.52

Step by Step Solution

1. Step 1: Write the proportion equation
   9,915.81 : 13,682.95 = 5,439.52 : x
2. Step 2: Convert to fraction form
   9,915.81/13,682.95 = 5,439.52/x
3. Step 3: Cross multiply
   9,915.81x = 13,682.95 × 5,439.52
4. Step 4: Simplify right side
   9,915.81x = 74,428,680.18
5. Step 5: Solve for x
   x = 74,428,680.18/9,915.81
6. Step 6: Final answer
   x = 7,506.06