Finding the Fourth Proportional to 12,924.40, 17,836.02 and 7,888.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,924.40 : 17,836.02 = 7,888.72 : x
2. Step 2: Convert to fraction form
   12,924.40/17,836.02 = 7,888.72/x
3. Step 3: Cross multiply
   12,924.40x = 17,836.02 × 7,888.72
4. Step 4: Simplify right side
   12,924.40x = 140,703,367.69
5. Step 5: Solve for x
   x = 140,703,367.69/12,924.40
6. Step 6: Final answer
   x = 10,886.65