Finding the Fourth Proportional to 12,923.55, 17,836.18 and 7,886.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,923.55 : 17,836.18 = 7,886.72 : x
2. Step 2: Convert to fraction form
   12,923.55/17,836.18 = 7,886.72/x
3. Step 3: Cross multiply
   12,923.55x = 17,836.18 × 7,886.72
4. Step 4: Simplify right side
   12,923.55x = 140,668,982.40
5. Step 5: Solve for x
   x = 140,668,982.40/12,923.55
6. Step 6: Final answer
   x = 10,884.70