Finding the Fourth Proportional to 12,396.02, 17,100.17 and 7,915.06

Step by Step Solution

1. Step 1: Write the proportion equation
   12,396.02 : 17,100.17 = 7,915.06 : x
2. Step 2: Convert to fraction form
   12,396.02/17,100.17 = 7,915.06/x
3. Step 3: Cross multiply
   12,396.02x = 17,100.17 × 7,915.06
4. Step 4: Simplify right side
   12,396.02x = 135,348,871.56
5. Step 5: Solve for x
   x = 135,348,871.56/12,396.02
6. Step 6: Final answer
   x = 10,918.74