Finding the Fourth Proportional to 12,608.88, 17,393.40 and 7,892.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,608.88 : 17,393.40 = 7,892.16 : x
2. Step 2: Convert to fraction form
   12,608.88/17,393.40 = 7,892.16/x
3. Step 3: Cross multiply
   12,608.88x = 17,393.40 × 7,892.16
4. Step 4: Simplify right side
   12,608.88x = 137,271,495.74
5. Step 5: Solve for x
   x = 137,271,495.74/12,608.88
6. Step 6: Final answer
   x = 10,886.89