Finding the Fourth Proportional to 7,961.94, 11,863.89 and 7,089.57

Step by Step Solution

1. Step 1: Write the proportion equation
   7,961.94 : 11,863.89 = 7,089.57 : x
2. Step 2: Convert to fraction form
   7,961.94/11,863.89 = 7,089.57/x
3. Step 3: Cross multiply
   7,961.94x = 11,863.89 × 7,089.57
4. Step 4: Simplify right side
   7,961.94x = 84,109,878.63
5. Step 5: Solve for x
   x = 84,109,878.63/7,961.94
6. Step 6: Final answer
   x = 10,563.99