Finding the Fourth Proportional to 11,915.21, 17,872.95 and 3,595.30

Step by Step Solution

1. Step 1: Write the proportion equation
   11,915.21 : 17,872.95 = 3,595.30 : x
2. Step 2: Convert to fraction form
   11,915.21/17,872.95 = 3,595.30/x
3. Step 3: Cross multiply
   11,915.21x = 17,872.95 × 3,595.30
4. Step 4: Simplify right side
   11,915.21x = 64,258,617.14
5. Step 5: Solve for x
   x = 64,258,617.14/11,915.21
6. Step 6: Final answer
   x = 5,392.99