Finding the Fourth Proportional to 7,185.78, 10,785.93 and 5,108.13

Step by Step Solution

1. Step 1: Write the proportion equation
   7,185.78 : 10,785.93 = 5,108.13 : x
2. Step 2: Convert to fraction form
   7,185.78/10,785.93 = 5,108.13/x
3. Step 3: Cross multiply
   7,185.78x = 10,785.93 × 5,108.13
4. Step 4: Simplify right side
   7,185.78x = 55,095,932.61
5. Step 5: Solve for x
   x = 55,095,932.61/7,185.78
6. Step 6: Final answer
   x = 7,667.36