Finding the Fourth Proportional to 12,461.52, 17,189.94 and 7,915.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,461.52 : 17,189.94 = 7,915.80 : x
2. Step 2: Convert to fraction form
   12,461.52/17,189.94 = 7,915.80/x
3. Step 3: Cross multiply
   12,461.52x = 17,189.94 × 7,915.80
4. Step 4: Simplify right side
   12,461.52x = 136,072,127.05
5. Step 5: Solve for x
   x = 136,072,127.05/12,461.52
6. Step 6: Final answer
   x = 10,919.38