Finding the Fourth Proportional to 9,915.06, 13,682.82 and 5,438.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,915.06 : 13,682.82 = 5,438.76 : x
2. Step 2: Convert to fraction form
   9,915.06/13,682.82 = 5,438.76/x
3. Step 3: Cross multiply
   9,915.06x = 13,682.82 × 5,438.76
4. Step 4: Simplify right side
   9,915.06x = 74,417,574.10
5. Step 5: Solve for x
   x = 74,417,574.10/9,915.06
6. Step 6: Final answer
   x = 7,505.51