Finding the Fourth Proportional to 9,915.09, 13,682.73 and 5,438.84

Step by Step Solution

1. Step 1: Write the proportion equation
   9,915.09 : 13,682.73 = 5,438.84 : x
2. Step 2: Convert to fraction form
   9,915.09/13,682.73 = 5,438.84/x
3. Step 3: Cross multiply
   9,915.09x = 13,682.73 × 5,438.84
4. Step 4: Simplify right side
   9,915.09x = 74,418,110.82
5. Step 5: Solve for x
   x = 74,418,110.82/9,915.09
6. Step 6: Final answer
   x = 7,505.54