Finding the Fourth Proportional to 7,858.52, 11,789.42 and 7,074.30

Step by Step Solution

1. Step 1: Write the proportion equation
   7,858.52 : 11,789.42 = 7,074.30 : x
2. Step 2: Convert to fraction form
   7,858.52/11,789.42 = 7,074.30/x
3. Step 3: Cross multiply
   7,858.52x = 11,789.42 × 7,074.30
4. Step 4: Simplify right side
   7,858.52x = 83,401,858.53
5. Step 5: Solve for x
   x = 83,401,858.53/7,858.52
6. Step 6: Final answer
   x = 10,612.93