Finding the Fourth Proportional to 13,915.59, 19,205.49 and 8,612.12

Step by Step Solution

1. Step 1: Write the proportion equation
   13,915.59 : 19,205.49 = 8,612.12 : x
2. Step 2: Convert to fraction form
   13,915.59/19,205.49 = 8,612.12/x
3. Step 3: Cross multiply
   13,915.59x = 19,205.49 × 8,612.12
4. Step 4: Simplify right side
   13,915.59x = 165,399,984.54
5. Step 5: Solve for x
   x = 165,399,984.54/13,915.59
6. Step 6: Final answer
   x = 11,885.95