Finding the Fourth Proportional to 3,807.86, 5,688.75 and 3,786.26

Step by Step Solution

1. Step 1: Write the proportion equation
   3,807.86 : 5,688.75 = 3,786.26 : x
2. Step 2: Convert to fraction form
   3,807.86/5,688.75 = 3,786.26/x
3. Step 3: Cross multiply
   3,807.86x = 5,688.75 × 3,786.26
4. Step 4: Simplify right side
   3,807.86x = 21,539,067.64
5. Step 5: Solve for x
   x = 21,539,067.64/3,807.86
6. Step 6: Final answer
   x = 5,656.48