Finding the Fourth Proportional to 12,892.38, 17,794.71 and 7,921.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,892.38 : 17,794.71 = 7,921.50 : x
2. Step 2: Convert to fraction form
   12,892.38/17,794.71 = 7,921.50/x
3. Step 3: Cross multiply
   12,892.38x = 17,794.71 × 7,921.50
4. Step 4: Simplify right side
   12,892.38x = 140,960,795.27
5. Step 5: Solve for x
   x = 140,960,795.27/12,892.38
6. Step 6: Final answer
   x = 10,933.65