Finding the Fourth Proportional to 7,759.25, 10,712.81 and 5,111.15

Step by Step Solution

1. Step 1: Write the proportion equation
   7,759.25 : 10,712.81 = 5,111.15 : x
2. Step 2: Convert to fraction form
   7,759.25/10,712.81 = 5,111.15/x
3. Step 3: Cross multiply
   7,759.25x = 10,712.81 × 5,111.15
4. Step 4: Simplify right side
   7,759.25x = 54,754,818.39
5. Step 5: Solve for x
   x = 54,754,818.39/7,759.25
6. Step 6: Final answer
   x = 7,056.72