Finding the Fourth Proportional to 7,085.78, 9,776.89 and 4,101.43

Step by Step Solution

1. Step 1: Write the proportion equation
   7,085.78 : 9,776.89 = 4,101.43 : x
2. Step 2: Convert to fraction form
   7,085.78/9,776.89 = 4,101.43/x
3. Step 3: Cross multiply
   7,085.78x = 9,776.89 × 4,101.43
4. Step 4: Simplify right side
   7,085.78x = 40,099,209.45
5. Step 5: Solve for x
   x = 40,099,209.45/7,085.78
6. Step 6: Final answer
   x = 5,659.11