Finding the Fourth Proportional to 12,926.05, 17,839.91 and 7,893.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,926.05 : 17,839.91 = 7,893.20 : x
2. Step 2: Convert to fraction form
   12,926.05/17,839.91 = 7,893.20/x
3. Step 3: Cross multiply
   12,926.05x = 17,839.91 × 7,893.20
4. Step 4: Simplify right side
   12,926.05x = 140,813,977.61
5. Step 5: Solve for x
   x = 140,813,977.61/12,926.05
6. Step 6: Final answer
   x = 10,893.81