Finding the Fourth Proportional to 7,785.51, 10,755.71 and 5,103.09

Step by Step Solution

1. Step 1: Write the proportion equation
   7,785.51 : 10,755.71 = 5,103.09 : x
2. Step 2: Convert to fraction form
   7,785.51/10,755.71 = 5,103.09/x
3. Step 3: Cross multiply
   7,785.51x = 10,755.71 × 5,103.09
4. Step 4: Simplify right side
   7,785.51x = 54,887,356.14
5. Step 5: Solve for x
   x = 54,887,356.14/7,785.51
6. Step 6: Final answer
   x = 7,049.94